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KIN2320 Final > MUSCLES OF THE ARM > Flashcards

MUSCLES OF THE ARM Flashcards

1
Q

What are the 4 arm muscles?

A
  1. biceps brachii
  2. brachialis
  3. coracobrachialis
  4. triceps brachii
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2
Q

What are the 3 flexor muscles of the arm?

A
  1. biceps brachii
  2. brachialis
  3. coracobrachialis
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3
Q

What is the extensor muscle of the arm?

A

triceps brachii

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4
Q

what innervates the arm flexors?

A

musculocutaneous nerve

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5
Q

what innervates the arm extensor?

A

radial nerve

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6
Q

what are the proximal and distal attachments of biceps brachii?

A

proximal:
short head: coracoid process
long head: supraglenoid tubercle of scapula

distal: tuberosity of radius

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7
Q

what is the innervation of biceps brachii?

A

musculocutaneous nerve

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8
Q

what is the action of biceps brachii?

A

supinates forearm

flexes elbow when forearm is supinated

short head resists shoulder dislocation

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9
Q

what are the proximal and distal attachments of brachialis?

A

proximal: distal humerus
distal: coronoid process and tuberosity of ulna

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10
Q

what is the innervation of brachialis?

A

musculocutaneous nerve

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11
Q

what is the action of brachialis?

A

flexes elbow

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12
Q

what are the proximal and distal attachments of coracobrachialis?

A

proximal: coracoid process of scapula
distal: middle of humerus

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13
Q

what is the innervation of coracobrachialis?

A

musculocutaneous nerve

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14
Q

what is the action of coracobrachialis?

A

flex and adduct shoulder

resist dislocation of shoulder

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15
Q

what are the proximal and distal attachments of triceps brachii?

A

proximal attachment:
long head: infraglenoid tubercle
lateral head: humerus
medial head: humerus

distal: olecranon

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16
Q

what is the innervation of triceps brachii?

A

radial nerve

17
Q

what is the action of triceps brachii?

A

extend elbow

18
Q

what are the proximal and distal attachments of the anconeus?

A

proximal: lateral epicondyle of humerus
distal: olecranon

19
Q

what innervates the anconeus?

A

radial nerve

20
Q

what is the action of the anconeus?

A

assists triceps in extending elbow

abduct ulna during pronation

21
Q

where is the cubital fossa?

A

anterior surface of the elbow

22
Q

what are the boundaries of the cubital fossa?

A

superiorly: imaginary line btw medial and lateral epicondyles
medially: pronator teres
laterally: brachioradialis
floor: brachialis and supinator muscles
roof: brachial and antebrachial fascia

23
Q

what are the contents of the cubital fossa?

A
  1. brachial artery
  2. biceps brachii tendon
  3. median nerve
  4. radial nerve

KIN2320 Final (10 decks)

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