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CT MSK > UE: Myology > Flashcards

UE: Myology Flashcards

1
Q

Pectoralis Major M.

Origin (4)

Insertion

Action on Humerus (4) & Scapula (2)

Nerve

A

Origin

Clavicular Head: Clavical (medial 1/2)

Sternocostal Head: Anterior Surface of Sternum

Aponeurosis External Abdominal Oblique

Costal Cartilages 1-6

Insertion

Lateral portion of Intertubercular Groove

Action

ADuct Humerus

Mediall rotate humerus

Flex Humerus

Extend humerus from a Flex state

Protract Scpula

Depress Scapula

Nerve

Lateral and Medial Pectoral N.

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2
Q

Pectoralis Minor

Origin

Insertion

Action

Nerve

A

O: Medial Aspect of Ribs 3-5

I: Coracoid Process of Scapula

A: Stabilize scapula through protracting and depressing is against thoracic wall

N: Medial Pectoral N.

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3
Q

Subclavius M.

Origin

Insertion

Action

Nerve

A

O: 1st Rib and 1st costal cartilage

I: Inferior aspect of Clavical

A: Position and Depress clavical

N: Subclavian N (Nerve to Subclavius C5-C6)

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4
Q

Serratus Anterior M.

Origin

Insertion

Action

Nerve

A

O: Lateral External surface of ribs 1-8

I: Anterior and medial surface of Scapula

A: Protract Scapula and Rotate glenoid cavity superiorly

N: Long Thoracic N.

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5
Q

Winging of the scapula is when the scapula pulls away from the thoracic wall, so that abducting the upper limb beyond horizontal difficult. Damage to what nerve damages what muscle that causes “winging of the scapula?

A

Long Thoracic N.

Serratus Anterior M.

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6
Q

Deltoid M.

Origin (3)

Insertion

Action (5)- based on muscle portion

Nerve

A

O: Lateral 1/3 Clavical, Scapular Spine, Acromion

I: Deltoid Tuberosity of Humerus

Action

Anterior: Flex and Medially rotate humerus

Medial: ABduct the humerus

Posterior: Extend and Laterally rotate

Nerve

Axillary N.

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7
Q

Subscapularis M.

Origin

Insertion

Action (2)

Nerve

A

Origin

Subscapular fossa

Insertion

Lesser tubercle of Humerus

Action

Medially rotate and ADduct humerus

Nerve

Upper and Lower Subscapular N.

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8
Q

Supraspinatus M.

Origin

Insertion

Action

Nerve

A

Origin

Supraspinous Fossa

Insertion

Greater Tubercle of Humerus

Action

ABduct humerus

Nerve

Suprascapular N.

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9
Q

Infraspinatus M.

Origin

Insertion

Action

Nerve

A

Origin

Infraspinous Fossa

Insertion

Greater Tubercle of Humerus

Action

Laterally Rotate the Humerus

Nerve

Suprascapular N.

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10
Q

List all of the muscles of the Rotator cuff. Note that each of these holds the humeral head in the glenoid cavity

A

Subscapularis M.

Supraspinatus M.

Infraspinatus M.

Teres Minor M.

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11
Q

Teres Major M.

Origin

Insertion

Action

Nerve

A

Origin

Posterior aspect of Inferior Angle of Scapula

Insertion

Medial edge of Intertubercular Groove

Action

ADduct and Medially rotate humerus

Nerve

Lower Subscapular N.

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12
Q

Biceps Brachii M.

Origin

Insertion (2)

Action (3)

Nerve

A

Origin

Long Head: Supraglenoid Tubercle of the Scapula

Short Head: Coracoid Process of the Scapula

Insertion

Radial tuberosity

Antebrachial fascia as bicipital aponeurosis

Action

Flex Humerus

Supinate

Short head resists dislocation of the shoulder

Nerve

Musculocutaneous N.

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13
Q

What is the Popeye Deformity?

A

Long Head of the Biceps Tendon dislocates from intertubercular Groove or seperates entirely from the supraglenoid tubercle causing the muscle to ball up in the arm

Caused by repetitive motion

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14
Q

Coracobrachialis M.

Origin

Insertion

Action (2)

Nerve

A

Origin

Coracoid process of Scapula

Insertion

Humeral body (medial aspect)

Action

Flex and ADduct Humerus

Nerve

Musculocutaneous N.

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15
Q

Brachialis M.

Origin

Insertion (2)

Action

Nerve

A

Origin

Humeral Body (distal half of anterior side)

Insertion

Ulnar Tuberosity and Coronoid Process

Action

Flex the forearm

Nerve

Musculocutaneous N.

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16
Q

Triceps Brachii M.

Origin (3)

Insertion (2)

Action

Nerve

Which head of the triceps resists dislocation of the shoulder

A

Origin

Long Head: Infraglenoid Tubercle of Scapula

Medial Head: Humeral body Inferior to Radial groove

Lateral Head: Humeral body Superior to Radial Groove

Insertion

Olecranon

Antebrachial Fascia

Action

Extend forearm

Nerve

Radial N.

Long Head of Triceps Brachii resists shoulder dislocation with the long head of the biceps brachii

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17
Q

Anconeus M.

Origin

Insertion

Action (2)

Nerve

A

Origin

Lateral Humeral Epiconyle

Insertion

Lateral Aspect of Olecranon

Action

Extend forearm

Stabilize Elbow joint

Nerve

Radial N.

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18
Q

What makes up the Triangular Space?

What is found in the space?

A

Teres Minor

Teres Major

Long Head of Triceps Brachii M.

Circumflex Scapular A. and V.

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19
Q

What makes up the Quadrangular Space?

What is found in the space?

A

Teres Major and Minor M.

Long and Lateral Head of Triceps Brachii. M

Posterior Humeral Circumflex A and V

Axillary N.

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20
Q

What makes up the Triangular Interval?

What is found in the interval?

A

Teres Major M.

Long and Lateral Head of Triceps Brachii M.

Radial N.

Deep Brachial A. and V.

21
Q

What is the only tendon of the flexor muscles that does not go through the carpal tunnel?

A

Palmaris Longus M.

22
Q

What are the flexor muscles in each layer of the forearm?

Superficial (4)

Middle (1)

Deep (3)

A

Superficial

Pronator Teres M.

Flexor Carpi Radialis M.

Palmaris Longus M.

Flexor Carpi Ulnaris M,

Intermediate

Flexor Digitorum Superficialis M.

Deep

Flexor Digitorum Profundus M.

Flexor Pollicis Longus M.

Pronator Quadratus

23
Q

What are the only two flexor muscles of the forearm that are innervated by the Ulnar N. and NOT the median N.?

A

Flexor Carpi Ulnaris M.

Flexor Digitorum Profundus M. (medial half)

NOTE: the Ulnar N. is sandwiched between these muscles

24
Q

Pronator Teres M.

Origin (Humeral Head and Ulnar Head)

Insertion

Action (2)

Nerve

A

Origin

Humeral Head: Medial Humeral Epicondyle

Ulnar Head: Coronoid Process of the Ulna

Insertion

Radius (lateral aspect)

Action

Pronate Forearm

Flex Forearm

Nerve

Median N.

25
Q

Flexor Carpi Radialis M.

Origin

Insertion

Action (3)

Nerve

A

Origin

Medial Humeral Epicondyle

Insertion

Base of 2nd Metacarpal

ACtion

Flex Forearm

Flex Hand at wrist

ABduct hand at wrist

Nerve

Median N.

26
Q

Palmaris Longus M.

Origin

Insertion (2)

Action

Nerve

A

Origin

Medial Humeral Epicondyle

Insertion

Palmar Aponeurosis

Flexor Retinaculum

Action

Flex Forearm

Flex Hand

Tense Palmar Aponeurosis

Nerve

Median N.

27
Q

Flexor Carpi Ulnaris M.

Origin (Humeral & Ulnar Head)

Insertion

Action (3)

Nerve

A

Origin

Humeral Head: Medial Humeral Epicondyle

Ulnar Head: Olecranon and Posterior Ulna

Insertion

Pisiform, Hook of Hamate

Base of 5th metacarpal

Action

Flex Forearm

ADduct Wrist

Flex Hand

Nerve

Ulnar N.

28
Q

Flexor Pollicis Longus M.

Origin

Insertion

Action

Nerve

A

Origin

Radius

Interosseous Membrane

Insertion

Base of Distal Phalanx of Pollux

Action

Flex Hand

Flex and ABduct 1st metacarpal @ carpometacarpal

Nerve

Anterior Interosseous N. (Median N.)

29
Q

Pronator Quadratus M.

Origin

Insertion

Action

Nerve

A

Origin

Ulna

Insertion

Radius

Action

Pronate Forarm

Nerve

Anterior Interosseous N. (of Median N.)

30
Q

Brachioradialis M.

A

Origin

Lateral Humeral Supracondylar Ridge

Insertion

Distal Radius (lateral side)

Action

Flex forearm (most force during midpronation)

Nerve

Radial N.

31
Q

Extensor Carpi Radialis Longus M.

A

Origin

Lateral Humeral Supracondylar Ridge

Insertion

Base of 2nd metacarpal

Action

Extend and ABduct Hand at the Wrist

Nerve

Radial N.

32
Q

Extensor Carpi Radialis Brevis M.

Origin

Insertion

Action

Nerve

A

Origin

Lateral Humeral Epicondyle

Insertion

Base of 3rd Metacarpal

Action

Extend

ABduct wrist

Nerve

Deep Radial N.

33
Q

Extensor Digitorum M.

Origin

Insertion

Action

Nerve

A

Origin

Lateral Humeral Epicondyle

Insertion

Extensor Expansions of Digits 2-5

Action

Extend Hand at Wrist

Extend all phalanges of digits 2-5 at each joint

Nerve

Posterior Interosseous N.

34
Q

Extensor Digiti Minimi M.

Origin

Insertion

Action

Nerve

A

Origin

Lateral Humeral Epicondyle

Insertion

Extensor Expansion of Digit 5

Action

Extend all joints of Digit 5

Nerve

Posterior Interosseous N.

35
Q

Extensor Carpi Ulnaris M.

Origin

Insertion

Action

Nerve

A

Origin

Lateral Humeral Epicondyle

Insertion

Base of 5th Metacarpal

Action

EXtend hand

ADduct Hand

(active during fist clenching)

Nerve

Posterior Interosseous N.

36
Q

Whats the difference between Tennis Elbow and Golfer’s Elbow?

A

Tennis Elbow

Also called Lateral Epicondylitis

Golfers Elbow

Medial Epicondylitis

37
Q

Supinator M.

A

Origin

Lateral Humeral Epicondyle

Radial Collateral L.

Annular L.

Supinator Crest

Supinator Fossa

Insertion

Radial Body

Action

Supinate Forearm

Nerve

Deep Radial N.

38
Q

Extensor Indicis M.

A

Origin

Distal Ulna

Interosseous Membrane

Insertion

Extensor Expansion of Digit 2

Action

Extend Hand

Extend 2nd digit

Nerve

Posterior Interosseous N.

39
Q

What are the outcropping muscles of the deep layer of extensors?

Which of these inserts at the base of the 1st metacarpal, and not the dorsal aspect of the base of the proximal phalanx?

What nerve innervates these muscles?

A

ABductor Pollicis Longus M.

Extensor Pollicis Brevis M.

Extensor Pollicis Longus M.

ABductor Pollicis Longus M.

Posterior Interosseous N.

40
Q

What muscles define each of the borders of the anatomical snuff box?

Anterior (Lateral)

Medial (Posterior)

What are the contents of the Anatomical Snuff box?

A

Anterior/Lateral: Extensor and ABductor Pollicis Longus M.

Medial: Extensor Pollicis Brevis M.

Contents

Radial A.

Superficial Radial N.

41
Q

Injury to what nerve could lead to complication in the action of opposing the thumb?

A

Median N.

42
Q

What are the Thenar Eminance muscles?

Which of these muscles is innervated by the Recurrent Branch of Median N.?

Which of these muscles is innervated by the Deep Ulnar N. ?

A

Muscles of Thenar Eminance

ABductor Pollicis Brevis M.

Opponens Pollicis M.

Flexor Pollicis Brevis M.

ADductor Pollicis M.

Recurrent Branch of Median N.

ABductor Pollicis Brevis M.

Opponens Pollicis M.

Deep Ulnar N.

ADductor Pollicis M.

Flexor Pollicis BRevis M.

43
Q

ABductor Pollicis Brevis M., Opponens Pollicis M., Flexor Pollicis Brevis M. all originate from what location within the Thenar Eminance?

ADductor Pollicis Brevis M. originates from what location within the Thenar Eminance?

A

Tubercles of Scaphoid and Trapezium and Flexor Retinaculum

(Inserts on Lateral aspect)

ADuctor Pollicis Brevis M.

Capitate and Bases of 2nd and 3rd metacarpals

(inserts on medial aspect)

44
Q

All of the following muscles of the Hypothenar Eminance originate from the hook of hamate bone and flexor retinaculum, EXCEPT?

Where does it originate?

A. ABductor Digiti Minimi M.

B. Flexor Digiti Minimi Brevis M.

C. Opponens Digiti Minimi M.

A

ABductor Digiti Minimi M.

Originates off the Pisiform B.

45
Q

All of the muscles that are found in the hypothenar eminance are innervated by what nerve?

ABductor Digiti Minimi M.

Flexor Digiti Minimi Brevis M.

Opponens Digiti Minimi M.

A

Deep Ulnar N.

46
Q

T/F: Lumbricals, Dorsal Interossei M. (DAB), Palmar Interossei M. (PAD) all insert on the extensor expansions of digits

A

True

47
Q

All of the following Intermediate muscles of the hand are innervated by the Deep Ulnar N., except for whcih of the following that is innervated by Median N. ?

A. 1st and 2nd Lumbricals

B. 3rd and 4th Lumbricals

C. DABs

D. PADs

A

1st and 2nd Lumbricals

48
Q

Look at it

A

Look at it

CT MSK (20 decks)

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