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Human Anatomy: 476 > Arm and Forearm > Flashcards

Arm and Forearm Flashcards

1
Q

What does the head of the radius articulate with?

A

Capitulum of humerus bone

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2
Q

What does the Trochlear notch of the ulna articulate with?

A

trochlea of humerus

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3
Q

Is the radius medial/lat to ulna (thumb side)

A

Lateral

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4
Q

Annular ligament is only attached to ulna: T or F

A

True

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5
Q

What does the annular ligament allow the head of radius to do?

A

Rotate for pronation and supination

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6
Q

What is the joint between the ulna and the humerus called? What is it’s action?

A

1). Hinge joint
2). Flexion and Extension only

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7
Q

What are the two heads for biceps brachii?

A

Short head: coracoid process
Long head: above glenoid fossa

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8
Q

What is the distal attachment for biceps brachii?

A

radial tuberosity and bicipital aponeurosis

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9
Q

What is the action of Biceps brachii?

A

Glenohumeral and elbow flexion, supination

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10
Q

What does brachialis attach to?

A

Attaches to humeral shaft and ulnar tuberosity

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11
Q

What is the action of Brachialis?

A

Flexion of the elbow

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12
Q

What does coracobrachialis attach to?

A

Attaches to coracoid and humeral shaft

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13
Q

What is the action of Coracobrachialis?

A

Flexion of the glenohumeral joint

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14
Q

What is the innervation of Ant. arm?

A

Musculocutaneous nerve

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15
Q

What are the three heads of triceps brachii and attachment points?

A

1). Long head: attaches to scapula below glenoid fossa
2). Medial head: humeral shaft
3). Lateral head: humeral shaft

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16
Q

What does triceps brachii insert into?

A

olecranon of the ulna

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17
Q

What is the action of triceps brachii?

A

Glenohumeral and elbow extension

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18
Q

What are the rules for Ant. arm compartment? (Flexors)
Don’t mix this up with the leg

A
  • Glenohumeral flexion
    -Elbow flexion
  • supination
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19
Q

What are the rules for Post. arm compartment? (Extensors) Don’t mix this up with the leg

A
  • Glenohumeral extension
  • Elbow extension
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20
Q

Which of the following would be a potential effect of damage to the musculocutaneous nerve?
A). Difficulty flexing shoulder and elbow
B). Difficulty extending the shoulder and elbow
C). Numbness on the lateral forearm
D). All of the above
E). A and C

A

E). A and C
- Difficulty flexing shoulder and elbow
- Numbness on lat. forearm

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21
Q

What is the joint between the 1st metacarpal and trapezium?

A

Saddle point
allows opposable thumb

22
Q

What are the actions of Ant. compartment (forearm)

A
  • Flexion of wrist and fingers
  • Pronation
23
Q

What are the actions of Post. compartment (forearm)

A
  • Extension of wrist and fingers
  • supination
24
Q

What is the one exception of the post. compartment when it comes to action?

A

Brachioradialis: FLEXES elbow

25
Q

What combination action happens in ant and post compartments of the forearm?

A

Abduction and Adduction of wrist (combination of ant. and post. muscles)

26
Q

Where does Flexor Carpi radialis extend from?

A

from forearm to metacarpals

27
Q

What is the action of Flexor carpi radialis?

A

Flexes and abducts wrist

28
Q

Where does Flexor carpi ulnaris extend from?

A

forearm to metacarpals

29
Q

What is the action of Flexor carpi ulnaris?

A

Flexes and adducts wrist

30
Q

Where does palmaris longus extend from?

A

forearm to palm

31
Q

What is the action of palmaris longus?

A

Flexes wrist

32
Q

Where does pronator teres extend from?

A

From humerus and ulna to radius

33
Q

What is the action of pronator teres?

A

Pronation

34
Q

Where does Flexor digitorum superficialis extend from?

A

From forearm to digits 2-5 (int. phalanges)

35
Q

what is the action of Flexor digitorum superficialis?

A

Flexes wrist and digits 2-5

36
Q

Where does flexor policus longus travel from?

A

forearm to thumb

37
Q

What is the action of flexor policus longus?

A

Flexes wrist and thumb

38
Q

Where does flexor digitorum profundus travel from?

A

forearm to digits 2-5 (distal phalanges)

39
Q

What is the action of Flexor digitorum profundus?

A

Flexes wrist and digits 2-5

40
Q

What is the innervation of Ant. forearm?

A

split between median and ulnar

41
Q

Median nerve

A

innervates most of the muscles in forearm (ant.)

42
Q

What muscles does Ulnar nerve innervate?

A

1). Flexor carpi ulnaris
2). ulnar (medial) 1/2 of flexor digitorum profundus (digits 4 and 5); only half

43
Q

A patient receives a stab wound in their anterior forearm that perforates their ulnar artery. Which other structure could most likely also be damaged in this injury?
A). Radial nerve
B). Median nerve
C). Ulnar nerve
D). Radial artery
E). Cephalic vein

A

C). Ulnar nerve

44
Q

where does brachioradialis travel from?

A

humerus to radius

45
Q

What is the action of brachioradialis?

A

flexion of elbow

46
Q

Where does Extensor carpi ulnaris travel from and what is its action?

A
  1. from forearm to metacarpals
  2. Extends and adducts the wrist
47
Q

Where does Extensor carpi radialis longus and brevis travel from?
What are their actions?

A
  1. from forearm to metacarpals
  2. extend and abduct the wrist
48
Q

Where does Extensor digitorum travel from?
What is its actions?

A

1). From forearm to digits 2-5
2). Extends wrist and digits 2-5

49
Q

1). Where does Extensor policis longus travel from?
2). What Is its actions?

A

1). thumb to forearm
2). Extends wrist and thumb

50
Q

Where does supinator travel from?
What are its actions?

A

1). Ulna to radius
2). supination

51
Q

What is the innervation of posterior arm?

A

Radial nerve innervates all posterior arm muscles

52
Q

What are the equivalents of ant forearm muscles to post. forearm muscles?

A

Flexor digitorum (superficialis and profundus)»> Extensor digitorum
Flex. pollicis longus» Ext. policis longus
Flex. carpi radialis» Ext. carpi radialis (longus and brevis)
Flex. carpi ulanris&raquo_space; Ext. carpi ulnaris
pronator teres» supinator
palmaris longus» Brachioradialis

Human Anatomy: 476 (6 decks)

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