upper arm muscles

Question 1

anterior compartment muscles and innervation

Answer 1

biceps brachii, brachialis, coracobrachialis
-musculocutaneous N

Question 2

biceps brachii origin, insertion

Answer 2

o - supraglenoid tubercle (long head), coracoid process (short head)
i - radial tuberosity

Question 3

biceps brachii action

Answer 3

-flex GHJ
-flex ulnohumeral joint (in supination)
-supinate forearm

Question 4

brachilalis origin and insertion

Answer 4

o - distal 1/2 of anterior humerus
i - ulnar tuberosity

Question 5

brachialis action

Answer 5

flex ulnohumeral joint (in pronation)

Question 6

coracobrachialis origin and insertion

Answer 6

o - coracoid process
i - proximal humerus

Question 7

coracobrachialis action

Answer 7

flex GHJ

Question 8

triceps brachii origin, insertion, innervation

Answer 8

o - infraglenoid tubercle (long head)
posterior superior humerus (lateral head)
inferior to radial groove (medial head)
i - olecranon tuberosity
in - radial N

Question 9

triceps brachii action

Answer 9

all heads: extend ulnohumeral joint
long head: extend GHJ