brachium Flashcards

1
Q

pa: biceps brachii (SHB)

A

coracoid process

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2
Q

da: biceps brachii

A

radial tuberosity

forearm fascia via bicipital aponeurosis

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3
Q

nerve innervation: biceps brachii

A

musculocutaneous nerve C5, C6, C7

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4
Q

pa: biceps brachii (LHB)

A

supraglenoid tubercle
labrum

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5
Q

muscle actions: biceps brachii

A

elbow flexion
forearm supination

SHB resists dislocation of shoulder

main contributor to elbow flexion when forearm is supinated

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6
Q

pa: coracobrachialis

A

coracoid process of scapula

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7
Q

da: coracobrachialis

A

middle humerus

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8
Q

nerve innervation: coracobrachialis

A

musculocutaneous nerve C5, C6, C7

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9
Q

muscle actions: coracobrachialis

A

helps with…
arm flexion
arm adduction

resists dislocation of shoulder

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10
Q

pa: brachialis

A

distal anterior humerus

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11
Q

da: brachialis

A

ulnar tuberosity
coronoid process of ulna

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12
Q

nerve innervation: brachialis

A

musculocutaneous nerve C5, C6

small branch from radial nerve C5, C7

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13
Q

muscle actions: brachialis

A

elbow flexion
(in all positions, strongest elbow flexor!)

main contributor to elbow flexion when forearm is pronated

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14
Q

pa: triceps brachii (LHT)

A

infraglenoid tubercle of scapula

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15
Q

pa: triceps brachii (lateral head)

A

posterior surface of humerus (superior to radial groove)

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16
Q

pa: triceps brachii (medial head)

A

posterior surface of humerus (inferior to radial groove)

17
Q

da: triceps brachii

A

olecranon of ulna

18
Q

nerve innervation: triceps brachii

A

radial nerve C6, C7, C8

19
Q

muscle actions: triceps brachii

A

elbow extension
especially important during adduction
LHT resists dislocation of humerus

20
Q

pa: anconeus

A

lateral epicondyle of humerus

21
Q

da: anconeus

A

lateral olecranon

22
Q

nerve innervation: anconeus

A

radial nerve C7, C8, T1

23
Q

muscle actions: anconeus

A

assits triceps in elbow extension
may abduct ulna during pronation
elbow joint stabilization