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Fall 2024: Anatomy 2 > Exam 1: Lecture 4-11 > Flashcards

Exam 1: Lecture 4-11 Flashcards

UE Anatomy

1
Q

Where does the Teres Major originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lower lateral border of scapula

Insertion: Medial lip of intertubercular groove

Action: Internal rotation, extension, adduction (same as lats)

Blood Supply: subscapular artery, scapular circumflex artery

Innervation: lower subscapular n.

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2
Q

Where does the serratus anterior originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral region of rib 1-8

Insertion: Medial border of scapula

Action: Scapular protraction and upward rotation

Blood supply: Lateral thoracic artery + superior thoracic artery

Innervation: Long thoracic n.

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3
Q

T or F? The pec major forms the anterior axillary fold?

A

True

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4
Q

Where does the pec major originate and insert? Action? Blood Supply? Innervation?

A

Origin (2 of them):
- Medial 1/2 of clavicle
- Sternum, costal cartilage 1-7

Insertion: lateral lip of intertubercular groove

Action: Adduction, internal rotation, horizontal adduction, flex extended arm, extend flexed arm

Blood supply: Pectoral branch of thoracoacromial trunk

Innervation: Lateral and medial pectoral nerves

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5
Q

The clavicular portion of the pec major performs what action?

A

Flex extended arm

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6
Q

The sternal portion of the pec major performs what action?

A

Extend flexed arm

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7
Q

Which muscles attach to the bicipital groove?

A

Pec major, latissimus dorsi, teres major

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8
Q

Where does the pec minor originate and insert? Action? Blood Supply? Innervation?

A

Origin: Anterior ribs 3-5

Insertion: Coracoid process

Action: Downward rotation, anterior tilt, depression of scapula, elevates ribcage for respiration

Blood Supply: Pectoral branch of thoracoacromial trunk

Innervation: Medial pectoral n

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9
Q

Rounded back posture occurs when which muscle is tight?

A

Pec minor

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10
Q

Where does the cephalic vein go?

A

Between the deltoid and pec major and drains into the axillary vein

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11
Q

Where does the basilic vein go?

A

Joins brachial vein and drains into the axillary vein

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12
Q

Where does the deltoid originate and insert?

A

Origin: Anterior portion of lateral 1/3 of clavicle, acromion, inferior/posterior scapular spine

Insertion: Deltoid tuberosity

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13
Q

What is the blood supply and innervation of the deltoid?

A

Blood Supply: Anterior and posterior humeral circumflex arteries, deltoid branch of thoracoacromial trunk

Innervation: Axillary n.

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14
Q

Which action does the anterior, middle, and posterior portion of the deltoid perform?

A

Anterior: Horizontal adduction, flexion, IR

Middle: abduction

Posterior: Horizontal abduction, extension, ER

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15
Q

Which structures sit in the radial groove (spiral groove) of humerus?

A

Radial nerve and deep brachial artery

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16
Q

T or F? The triceps lateral head and medial head attach to the radial groove

A

True

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17
Q

What is the olecranon process?

A

The tip of the elbow (part of the ulna)

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18
Q

T or F? The olecranon makes up the posterior border of the trochlear notch

A

True

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19
Q

Where is the coronoid process located?

A

Inferior (distal) border of trochlear notch

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20
Q

Where does the brachialis insert?

A

tuberosity of ulna

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21
Q

Where does the supinator originate?

A

Supinator crest

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22
Q

Describe the head of the radius?

A
  • Horizontal disc shape
  • Concave superior (articulates with capitulum)
  • Articulates with radial notch medially
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23
Q

Where does the biceps brachii attach?

A

Radial tuberosity

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24
Q

Which muscle attaches to the oblique line of the radius?

A

Flexor digitorum superficialis

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25
Q

What are the 3 joints/articulations of the elbow?

A

Humero-radial: radial head articulates with capitulum of humerus

Humero-ulnar: trochlear notch of ulna articulates with trochlea of humerus

Proximal radioulnar joint: radial head articulates with radial notch of ulna

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26
Q

What is the primary function of the annular ligament?

A

Prevent dislocation of radial head

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27
Q

Describe the lateral collateral ligament

A
  • Runs from lateral epicondyle to annular ligament of radius
  • Prevents varus (outward) motion
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28
Q

Describe the medial collateral ligament

A

Has 3 parts (triangular shaped)

  • Anterior part: Medial epicondyle to coronoid process of ulna (strongest)
  • Posterior part: Medial epicondyle to olecranon (weakest)

Transverse part: Coronoid process to olecranon

Prevents valgus (inward) motion

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29
Q

What is cubitus valgus?

A

when the arm extends past 180 degrees

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30
Q

What is carrying angle?

A

5-15 degrees of cubitus valgus (larger in females)

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31
Q

What does the anterior compartment of the upper arm contain?

A

Biceps, brachialis, coracobrachialis

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32
Q

Which artery supplies blood to the anterior compartment?

A

Brachial artery

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33
Q

Where does the biceps brachii originate and insert? Action? Blood supply? Innervation?

A

Origin
- Short head: Coracoid process of the scapula
- Long head: Supraglenoid tubercle

Insertion: Radial tuberosity

Action: Elbow flexion, supination, shoulder flexion (long head)

Blood Supply: Brachial artery

Innervation: Musculocutaneous n.

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34
Q

Where does the brachialis originate and insert? Action? Blood supply? Innervation?

A

Origin: Anterior surface of humerus

Insertion: Ulna tuberosity

Action: Elbow flexion

Blood Supply: Brachial artery

Innervation: Musculocutaneous n.

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35
Q

T or F? Biceps tendon rupture is the most common tendon rupture in the UE

A

True

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36
Q

Where is a biceps tendon rupture most likely to occur?

A

Proximal long head of biceps

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37
Q

Where does the coracobrachialis originate and insert? Action? Blood supply? Innervation?

A

Origin: Coracoid process of scapula

Insertion: Mid humerus

Action: Shoulder flexion, adduction

Blood Supply: Brachial artery

Innervation: Musculocutaneous n.

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38
Q

Which artery supplies the posterior compartment of the arm?

A

Deep brachial artery (travels with radial n.)

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39
Q

How many sensory branches come off the radial nerve?

A

3

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40
Q

Name the sensory branches that come off the radial nerve

A
  • Inferior lateral cutaneous n. (to the arm)
  • Posterior cutaneous n. (to the arm)
  • Posterior cutaneous n. (to the forearm)
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41
Q

Where do the triceps originate and insert? Action? Blood supply? Innervation?

A

Origin:
- Long head: Infraglenoid tubercle of scapula
- Lateral head: Posterior surface of humerus (superior to radial groove)
Medial head: Posterior surface of humerus (inferior to radial groove)

Insertion: Olecranon process

Action: Shoulder extension, elbow extension

Blood Supply: Deep brachial artery

Innervation: Radial n.

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42
Q

What are the 3 articulations of the elbow complex?

A
  • Humero-radial joint
  • Humero-ulnar joint
  • Proximal radioulnar joint
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43
Q

Which structures attach to the oblique line on the distal radius?

A

Supinator and Flexor Digitorum Superficialis

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44
Q

Which motions does the anterior compartment perform?

A

Wrist flexion, forearm pronation, digit flexion

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45
Q

Which motions does the posterior compartment perform?

A

Wrist extension, forearm supination

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46
Q

Which bone moves during pronation and supination of the forearm?

A

Radius

(Ulna remains stationary)

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47
Q

What is the primary function of the interosseus membrane?

A

Connects the radius and ulna and helps with force transmission (Force runs from radius to ulna)

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48
Q

Where do the anterior compartment muscles of the forearm originate?

A

Medial Epicondyle (except for the deep layer)

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49
Q

T or F? The superficial and intermediate layers of the anterior compartment (forearm) are innervated by the Median n.

A

True

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50
Q

T or F? The deep layer muscles of the anterior compartment (forearm) are innervated by the anterior interosseus nerve

A

True

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51
Q

T or F? The ulnar nerve only innervates 1.5 muscles of the anterior compartment

A

True

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52
Q

Which artery supplies the majority of the superficial muscles of the anterior compartment?

A

Ulnar artery

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53
Q

Which artery supplies the majority of the deep anterior compartment muscles?

A

Anterior interosseus artery

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54
Q

Where does the pronator teres originate and insert? Action? Blood Supply? Innervation?

A

Origin (2 Heads): Medial Epicondyle, coronoid process of the ulna

Insertion: Lateral surface of the radius

Action: Forearm pronation

Blood Supply: Ulnar and Radial a.

Innervation: Median n.

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55
Q

Where does the flexor carpi radialis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Medial epicondyle

Insertion: Bases of 2nd and 3rd metacarpal bones

Action: Wrist flexion + Radial deviation

Blood Supply: Ulnar a.

Innervation: Median n.

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56
Q

Where does the palmaris longus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Medial epicondyle

Insertion: Palmar aponeurosis, flexor retinaculum of the hand

Action: Wrist flexion

Blood Supply: Ulnar a.

Innervation: Median n.

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57
Q

Where does the flexor carpi ulnaris originate and insert? Action? Blood Supply? Innervation?

A

Origin: Medial epicondyle + Medial olecranon

Insertion: Pisiform, Hook of hamate, Base of 5th metacarpal

Action: Wrist flexion, ulnar deviation

Blood Supply: Ulnar a.

Innervation: Ulnar n.

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58
Q

Where does the flexor digitorum superficialis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Medial epicondyle, oblique line (radius)

Insertion: Base of middle phalanges of the 4 fingers

Action: PIP flexion

Blood Supply: Ulnar a.

Innervation: Median n.

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59
Q

Where does the flexor digitorum profundus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Upper anterior and medial surfaces of ulna, interosseus membrane of the forearm

Insertion: Base of distal phalanges

Action: PIP and DIP flexion

Blood Supply: Anterior interosseus a.

Innervation: ulnar n. and anterior interosseus n.

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60
Q

Where does the flexor pollicis longus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Anterior + Middle surfaces of radius, interosseus membrane of forearm

Insertion: Base of distal phalanx of thumb

Action: Thumb flexion

Blood Supply: Anterior interosseus a.

Innervation: Anterior interosseus n.

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61
Q

Where does the pronator quadratus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Medial, anterior surface of the ulna

Insertion: Lateral, anterior surface of radius

Action: Forearm pronation

Blood Supply: Anterior interosseus a.

Innervation: Anterior interosseus n.

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62
Q

Which muscles are in the deep anterior compartment?

A

Pronator quadratus, Flexor pollicis longus, flexor digitorum profundus

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63
Q

Which muscles are in the intermediate anterior compartment?

A

Flexor digitorum superficialis

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64
Q

Which muscles are in the superficial anterior compartment?

A

Pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

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65
Q

Which structure runs with the brachial artery?

A

Median n.

Proximal: runs lateral to artery
Distal: runs medial to artery

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66
Q

T or F? The median nerve innervates all flexors except medial half of Flexor Digitorum Profundus and Flexor Carpi Ulnaris

A

True

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67
Q

T or F? The median nerve runs between the two heads of the pronator teres, and deep to the flexor digitorum superficialis

A

True

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68
Q

The anterior interosseus nerve is a branch of ___________, runs deep to flexor digitorum profundus, and terminates at pronator quadratus

A

Median nerve

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69
Q

Does the median nerve run through the carpal tunnel?

A

Yes

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70
Q

which structures run on either side of the brachial artery throughout most of the upper arm?

A

Ulnar nerve runs medial,
Median nerve runs lateral

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71
Q

What path does the ulnar nerve take?

A
  • posterior to medial epicondyle via cubital tunnel in the elbow
  • enters anterior compartment through the two heads of flexor carpi ulnaris
  • runs superficial to flexor digitorum profundus
  • passes into the wrist superficial to flexor retinaculum (guyon’s canal)
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72
Q

Which structures pass through the cubital fossa?

A

brachial artery and median nerve

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73
Q

Which structures make up the boundaries of the cubital fossa?

A
  • Line between two humeral epicondyles
  • Brachioradialis
  • Pronator teres
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74
Q

T or F? The interosseous membrane is helpful in dispersing force when weight bearing through the hand because it transfers force from the ulna to the radius.

A

False, the force disperses from radius to ulna

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75
Q

The superficial and intermediate layers of the anterior compartment of the antebrachium is innervated by the

a. Ulnar nerve

b. Radial nerve

c. Median nerve

d. Both a and c

A

d. Both ulnar and median nerve

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76
Q
  1. Which nerve goes between the two heads of the pronator teres?

a. Ulnar nerve

b. Median nerve

c. Radial nerve

d. None of the above

A

b. Median nerve

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77
Q

The only muscle in the antebrachium that is fully innervated by the ulnar nerve is the:

a. Pronator teres

b. Flexor carpi radialis

c. Flexor carpi ulnaris

d. Flexor digitorum profundus

A

c. Flexor carpi ulnaris

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78
Q

What structure makes up the lateral border of the cubital fossa?

a. Pronator teres

b. Lateral epicondyle

c. Median nerve

d. Brachioradialis

A

d. Brachioradialis

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79
Q

T or F? The deep branch of the radial nerve provides motor innervation to the posterior compartment of the antebrachium

A

True

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80
Q

Brachioradialis can achieve which of the following motions?

a. Radial deviation

b. Elbow flexion

c. Supination

d. Both a and b

A

b. Elbow flexion

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81
Q

What is not a function of extensor pollicis longus?

a. Extension of thumb

b. Radial deviation

c. Wrist flexion

d. Wrist extension

A

c. Wrist flexion

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82
Q

The basilic vein drains into

a. Median cubital vein

b. Cephalic vein

c. Brachial vein

d. Axillary vein

A

d. Axillary vein

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83
Q

What structure in not contained within the anatomic snuffbox?

a. Scaphoid

b. Radial nerve

c. Radial artery

A

b. Radial nerve

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84
Q

The wall of Guyon’s canal is made up of

a. Hamate

b. Flexor retinaculum

c. Ulnar nerve

d. Pisiform

A

d. Pisiform

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85
Q

The first carpometacarpal joint is a saddle joint, which plane of motion is it not able to move in?

a. Sagittal

b. Frontal

c. Transverse

d. It can move in all of these planes

A

c. Transverse

86
Q

Where do the posterior compartment muscles of the forearm originate (except for deep layer)?

A

Lateral epicondyle of humerus

87
Q

What is the primary action of the posterior compartment muscles of the forearm?

A

Extend the digits and the hand, supinate the forearm

88
Q

All posterior compartment forearm muscles are innervated by which nerve?

A

Radial nerve or either of its two branches (deep radial or posterior interosseus)

89
Q

T or F? The deep radial nerve pierces through the supinator

A

True

90
Q

Which nerve innervates the pinky and half of the wring finger (digit 4.5 and 5)?

A

Ulnar n.

91
Q

What are the two primary arteries of the posterior compartment (forearm)?

A

Radial a. and Posterior interosseus a.

92
Q

Which muscles are in the posterior compartment of the forearm?

A

Superficial: Anconeus, Brachioradialis, Extensor Carpi Radialis Longus, Extensor Carpi Radialis Brevis, Extensor Digitorum, Extensor Digiti Minimi, Extensor Carpi Ulnaris

Deep: Supinator, Abductor Pollicis Longus, Extensor Pollicis Brevis, Extensor Pollicis Longus, Extensor Indicis

93
Q

Where does the anconeus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle

Insertion: Lateral olecranon

Action: Terminal elbow extension

Blood Supply: Deep brachial artery

Innervation: Radial n.

94
Q

Where does the brachioradialis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral supracondylar ridge of humerus

Insertion: Radial styloid process

Action: Elbow flexion

Blood Supply: Radial recurrent artery (via radial artery)

Innervation: Radial nerve

95
Q

Where does the Extensor Carpi Radialis Longus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral Supracondylar ridge of humerus

Insertion: posterior surface of 2nd metacarpal base

Action: Wrist deviation + Radial deviation

Blood Supply: Radial a.

Innervation: Radial n.

96
Q

Where does the Extensor Carpi Radialis Brevis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle

Insertion: Posterior surface of 3rd metacarpal base

Action: Wrist extension and Radial deviation

Blood Supply: Radial artery

Innervation: Radial nerve (deep branch)

97
Q

Where does the Extensor Digitorum originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle

Insertion: Extensor hood (digits II-V)

Action: Wrist, MP, PIP, DIP extension

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

98
Q

Where does the Extensor Digiti Minimi originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle

Insertion: Extensor hood (dorsal 5th digit)

Action: Wrist extension, 5th finger extension

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

99
Q

Where does the Extensor Carpi Ulnaris originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle

Insertion: 5th Metacarpal

Action: Wrist extension and ulnar deviation

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

100
Q

Where does the supinator originate and insert? Action? Blood Supply? Innervation?

A

Origin: Lateral epicondyle and proximal lateral surface of ulna (at supinator crest)

Insertion: Lateral proximal radius

Action: Supination

Blood Supply: Radial recurrent artery

Innervation: Radial nerve (deep branch)

101
Q

Where does the Extensor Pollicis Brevis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Radius and interosseus membrane

Insertion: proximal phalanx (of thumb)

Action: Extension of MP and CMC joint, wrist extension and radial deviation

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

102
Q

Where does the Extensor Pollicis Longus originate and insert? Action? Blood Supply? Innervation?

A

Origin: Middle 1/3 of posterior surface of ulna, interosseus membrane

Insertion: Distal phalanx of thumb

Action: Extension of thumb at CMC, MP, and IP joints… also does wrist extension and radial deviation

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

103
Q

Where does the Extensor Indicis originate and insert? Action? Blood Supply? Innervation?

A

Origin: Distal ulna, interosseus membrane

Insertion: Extensor hood of index finger

Action: Extension of index finger, wrist extension

Blood Supply: Posterior interosseus artery

Innervation: Posterior interosseus nerve

104
Q

Which muscles does the radial nerve innervate?

A

Brachioradialis, extensor carpi radialis longus

105
Q

Which muscles does the deep radial nerve innervate?

A

Extensor carpi radialis brevis, supinator

106
Q

Which muscles does the the posterior interosseus nerve innervate?

A

The rest of the posterior compartment muscles (extensors)

107
Q

Tennis elbow is referred to as…

Golfer’s elbow is referred to as…

A

Tennis elbow: also known as “Lateral epicondylitis”

Golfer’s elbow: also known as “Medial epicondylitis”

108
Q

The radial nerve provides cutaneous innervation where?

A

Posterior arm, lateral inferior arm, posterior forearm

109
Q

The axillary nerve provides cutaneous innervation where?

A

Lateral superior arm

110
Q

T or F? The cephalic vein runs between the groove of the deltoid and pec

A

True

111
Q

C4 dermatomes coordinate with…

A

Clavicular region

112
Q

C5 and T2 dermatomes coordinate with…

A

Lateral and Medial brachium (upper arm)

113
Q

C6 and T1 dermatomes coordinate with…

A

Lateral and Medial antebrachium (forearm)

114
Q

Median cubital vein and median antebrachial vein are branches of the…

A

basilic vein

115
Q

List the 8 carpal bones

A

Scaphoid, Lunate, Triquetrum, Pisiform, Hamate, Capitate, Trapezoid, Trapezium

116
Q

Describe the radiocarpal joint?

A
  • Known as the “wrist” joint
  • Performs flexion/extension, radial/ulnar deviation
117
Q

What is the midcarpal joint?

A

the joint between rows 1 and 2 of the carpal bones (pisiform not involved)

118
Q

What is the triangular fibrocartilage complex (TFCC)?

A
  • Complex located between ulna and carpals
  • triangular disc
  • dorsal/palmar radioulnar ligaments
  • ulnocarpal ligaments
119
Q

What is the function of the TFCC?

A

Provides cushioning at the medial wrist, holds distal bones together

120
Q

What is the anatomic snuffbox?

A
  • The space between the extensor pollicis brevis and extensor pollicis longus
  • Contains the scaphoid (palpate for fx) and radial artery
121
Q

Which ligament forms the roof of carpal tunnel?

A

Flexor retinaculum

122
Q

Which structures pass through carpal tunnel?

A
  • Median nerve
  • Flexor digitorum superficialis tendons (4)
  • Flexor digitorum profundus tendons (4)
  • Flexor pollicis longus tendon
123
Q

Ulnar nerve and artery pass through which canal?

A

Guyon’s Canal

124
Q

Which structures form the boundaries of Guyon’s canal?

A

Roof: palmar carpal ligament

Floor: flexor retinaculum

Wall: pisiform

125
Q

What are digital sheaths?

A

Holds the tendons together and provides synovial fluid allowing for mobility

126
Q

T or F? FPL has its own sheath while FDP and FPS share a sheath

A

True

127
Q

Which retinaculum is thinner? Flexor or extensor?

A

Extensor retinaculum

128
Q

Which structures pass beneath the extensor retinaculum?

List by sheath

A
  1. Extensor Pollicis Brevis and Abductor Pollicis Longus
  2. Extensor Carpi Radialis Longus and Extensor Carpi Radialis Brevis
  3. Extensor Pollicis Longus
  4. Extensor Digitorum and Extensor Indicis
  5. Extensor Digiti Minimi
  6. Extensor Carpi Ulnaris
129
Q

What is de quervains syndrome?

A

When the 1st extensor compartment (Abductor pollicis brevis and extensor pollicis brevis) become inflammed

130
Q

What is an intertendinous connection?

A
  • Connects adjacent fingers
  • Active extension of one finger is accompanied by passive movement of another
131
Q

Which finger can go into extension most independently?

A

index finger

132
Q

Describe the radial collateral ligament

A
  • Runs from the radial styloid process to the scaphoid/trapezium
  • Limits ulnar deviation
133
Q

Describe the ulnar collateral ligament

A
  • Part of TFCC
  • Runs from Ulnar styloid process to triquetrum and pisiform
  • Limits radial deviation
134
Q

List the deep anterior ligaments

A
  • Radial collateral ligament
  • Ulnar collateral ligament
  • Palmar radioulnar
  • Palmar radiocarpal
  • Ulnocarpal
  • Palmar intercarpal/carpometacarpal
135
Q

What is the palmar aponeurosis?

A
  • Flattened flexor tendons and condensed fascia
  • Protects bones, vessels, nerves
136
Q

What is dupuytrens contracture?

A

fixed flexion of palmar aponeurosis digits IV and V

137
Q

Describe CMC joint 1 (thumb)

A
  • Saddle joint
  • Performs flexion, extension, abduction, adduction
138
Q

Which CMC joints are mobile? stable?

A

Mobile: 1st, 4th, 5th

Stable: 2nd and 3rd

139
Q

MCP joints perform which actions?

A

Flexion, extension, abduction, adduction

140
Q

What are the primary functions of the palmar plate (ligament)?

A

Prevent hyperextension of the fingers

141
Q

T or F? The collateral ligaments of the MCP joints are tightened in flexion and slacked in extension

A

True

142
Q

What is the deep transverse metacarpal ligament?

A

Connects the heads of the metacarpals

143
Q

The recurrent branch of the median nerve provides innervation to

A

Thenar muscles (thumb)

144
Q

The digital branch of the median nerve provides innervation to

A

motor innervation: two lumbricals (radial side)

sensory innervation: digits 1-3 (palmar and dorsal tips)

145
Q

The palmar branch of the median nerve provides innervation to

A

sensory innervation: proximal palm, central wrist

(also runs superficial to carpal tunnel)

146
Q

The deep branch of the ulnar nerve provides motor innervation to

A
  • Hypothenar muscles
  • 2 lumbricals (ulnar side)
  • Deep intrinsic muscles
147
Q

The superficial branch of the ulnar nerve provides sensory innervation to

A
  • Palmar digit 5
  • half of digit 4
148
Q

The palmar branch of the ulnar nerve provides sensory innervation to

A

Medial palm

149
Q

The dorsal branch of the ulnar nerve provides sensory innervation to

A

Medial dorsum of hand and digits 4+5

150
Q

T or F? If someone has a TFCC rupture, they will not be able to press up from a chair or the ground

A

True

151
Q

Which artery supplies the supinator and brachioradialis?

A

Radial artery

152
Q

Does the brachioradialis move the wrist?

A

NO!

153
Q

T or F? the superficial branch of the radial nerve is the only branch to reach the hand

A

True

154
Q

Which fingers does the radial nerve innervate?

A

Digits 1,2,3, and half of 4

155
Q

The fingertips of digits 1-3.5 are innervated by which nerve?

A

Median nerve

156
Q

Which artery supplies the superficial hand muscles on the radial side

A

Superficial palmar arch artery

157
Q

Which artery supplies the superficial hand muscles on the ulnar side?

A

Ulnar artery

158
Q

Which artery supplies the deep intrinsic muscles of the hand?

A

Deep palmar arch artery

159
Q

Which of the following statements about the extensor hood is true?

  • Terminal slip of extensor hood drives DIP extension
  • Central slip of the extensor hood drives PIP extension
  • Extensor hood allows the hand intrinsic muscles to assist finger extension
  • All of the above
A

All of the above

160
Q

What is the primary function of dorsal interossei?

A

Abduction of digits II-IV

161
Q

What are the 3 muscles of the thenar (thumb) group?

A
  • Abductor pollicis brevis
  • Flexor pollicis brevis
  • Opponens pollicis
162
Q

Which of the following median nerve branches does not pass under the flexor retinaculum of the wrist?

  • Palmar branch
  • Recurrent branch
  • Digital branch
  • None of the above
A

Palmar branch

163
Q

Which of the following muscles is not innervated by the ulnar nerve?

  • Adductor pollicis
  • Dorsal interosseus
  • Palmar interosseus
  • Thenar muscles
A

Thenar muscles

164
Q

The cutaneous innervation of the 5th finger is provided by the

A

ulnar nerve

165
Q

Which nerves provide innervation to the posterior compartment of the antebrachium?

A

Deep radial nerve and posterior interosseus nerve

166
Q
  1. What is the action of the muscles in the posterior compartment of the forearm?

a. Forearm supination and wrist flexion

b. Forearm pronation and wrist flexion

c. Forearm supination and wrist extension

d. Forearm pronation and wrist extension

A

c. Forearm supination and wrist extension

167
Q

T or F? The distal ulna houses the scaphoid facet laterally and the lunate facet medially

A

False, the distal radius does

168
Q

The anterior interosseous nerve is a branch of the _________ nerve and the anterior interosseous artery is a branch of the __________ artery
a. Median, median
b. Median, ulnar
c. Ulnar, median
d. Ulnar, ulnar

A

b. Median, Ulnar

169
Q

Which muscle is the pisiform bone embedded in?

a. Flexor carpi radialis
b. Flexor digitorum profundus
c. Flexor digitorum superficialis
d. Flexor carpi ulnaris

A

d. Flexor carpi ulnaris

170
Q

What nerve runs in the cubital tunnel of the elbow?
a. Ulnar
b. Median
c. Radial
d. Anterior interosseus

A

a. Ulnar

171
Q

What is NOT included in the contents of the cubital fossa?
a. Tendon of biceps brachii
b. Median nerve
c. Brachial artery
d. Ulnar nerve

A

d. Ulnar nerve

172
Q

Which of the following muscles is NOT directly innervated by the radial nerve?

a. Extensor carpi radialis brevis
b. Extensor carpi radialis longus
c. Anconeus
d. Brachioradialis

A

Extensor carpi radialis brevis (innervated by deep radial)

173
Q

What nerve provides cutaneous innervation to the lateral superior arm?
a. Median
b. Musculocutaneous
c. Axillary
d. Radial

A

Axillary nerve

174
Q
  1. What bone does not articulate with the radius?
    a. Triquetrum
    b. Lunate
    c. Scaphoid
    d. Ulna
A

a. triquetrum

175
Q

What bone articulates with MC II?
a. Hamate
b. Capitate
c. Trapezium
d. Trapezoid

A

Trapezoid

176
Q

Which carpometacarpal (CMC) joints are stable? mobile?

A

Stable: 2nd and 3rd

Mobile: 1st, 4th, 5th

177
Q

In the distal articulation of the radius and ulna, the radius is ____ while the ulna is _____

A

Concave, convex

178
Q

Where does the median nerve enter the anterior compartment?

A

Between the 2 heads of the pronator teres

179
Q

The median cubital vein connects which two veins in the inner elbow?

A

Cephalic and basilic

180
Q
  1. Which of the following ligaments is not included in the triangular fibrocartilage complex?
    a. Radial collateral ligaments
    b. Ulnar collateral ligaments
    c. Ulnocarpal ligaments
    d. Dorsal radioulnar ligaments
A

a. Radial collateral ligaments

181
Q

The radial collateral ligament attaches which structures?

A

Radial styloid to scaphoid/trapezium

182
Q

What is the function of the palmar plate?

A

prevent hyperextension

183
Q

Which of the following is not a branch of the median nerve?

a. Recurrent branch (motor to thenar)
b. Deep branch
c. Digital branch (motor to lumbricals, sensory to finger tips 1-3)
d. Palmar branch (superficial to carpal tunnel, sensory to palm/wrist

A

b. Deep branch

184
Q

The thumb receives blood supply from ______ which is a branch of the ________

A

Princeps pollicis artery, deep palmar arch

185
Q

The lumbricals perform which actions?

A

Flex the MPs, extend the IPs

186
Q

The flexor pollicis brevis is innervated by the

A

median nerve

187
Q

What are the 3 hypothenar muscles?

A
  • Opponens digiti minimi
  • Abductor digiti minimi
  • Flexor digiti minimi
188
Q

The superficial palmar arch is formed by…

A
  • Ulnar artery
  • superficial branch of radial artery
189
Q

The deep palmar arch is formed by…

A
  • Radial artery
  • deep branch of ulnar artery
190
Q

T or F? Intrinsic muscles are for power grip and extrinsic muscles are for precision grip

A

False, intrinsic muscles are for precision grip while extrinsic muscles are for power grip

191
Q

The central slip and lateral bands of the extensor hood go where?

A

Middle phalanx

192
Q

The terminal slip of the extensor hood goes where?

A

Distal phalanx

193
Q

True or False? “trigger finger” is a flexion mechanism problem

A

True

194
Q

List the upper limb myotomes and finger dermatomes

A

Myotomes (upper limb)
- C5: Elbow flexion
- C6: Wrist extension
- C7: Elbow extension
- C8 Finger flexion
- T1: Finger abduction

Dermatomes:
- C6: Digit 1 and 2
- C7: Digit 2 and 3
- C8: Digit 4 and 5

195
Q

Which carpal bone articulates with MC 1?

A

Trapezium

196
Q

Which carpal bone articulates with MC2?

A

Trapezoid

197
Q

Which carpal bone articulates with MC 3?

A

Capitate

198
Q

Which carpal bone articulates with MC 4/5?

A

Hamate

199
Q

T or F? The ulnar artery supplies the hypothenar muscles of the hand

A

True

200
Q

T or F? The superficial muscles on the radial side of the hand are supplied by the superficial palmar arch

A

True

201
Q

T or F? The deep palmar arch supplies the intrinsic hand muscles

A

True

202
Q

The radius’ head concaves superiorly to articulate with…

A

Capitulum

203
Q

The proximal end of the ulna articulates with…

A

Trochlea of humerus

204
Q

The ulnar nerve only innervates which muscles of the anterior compartment?

A
  • Flexor Carpi Ulnaris
  • 1/2 of Flexor Digitorum Profundus
205
Q

What is De Quervain’s syndrome?

A

Also known as “hammer hand” or “hammer wrist”

Injuries to the first extension compartment (APL/EPB)

206
Q

T or F? The roof of the carpal tunnel is flexor retinaculum, the floor is the carpal bones

A

True

207
Q

Which structures pass through the carpal tunnel?

A
  • flexor digitorum superficialis (4 tendons)
  • flexor digitorum profundus (4 tendons)
  • flexor pollicis longus (1 tendon)
  • Median n.

(10 structures total)

208
Q

Which structures pass through the carpal tunnel?

A
  • flexor digitorum superficialis (4 tendons)
  • flexor digitorum profundus (4 tendons)
  • flexor pollicis longus (1 tendon)
  • Median n.

(10 structures total)

209
Q

T of F? Adductor pollicis is innervated by ulnar nerve

A

True

210
Q

Which nerve pierces through supinator?

A

Deep radial nerve

Fall 2024: Anatomy 2 (9 decks)

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