anterior compartment of arm

Question 1

coracobrachialis

Answer 1

origin- medial aspect of tip of coracoid process
insertion-medial border of humerus
nerve- musculocutaneous
action-flexion of arm in shoulder joint

Question 2

biceps branchii(short)

Answer 2

origin- lateral aspect of tip of coracoid process along with coracobrachialis
insertion-
nerve-musculocutaneous(C5-C6)
action- supinator, flexion of elbow ,flexor of arm, tested against resistance and all screwing movements

Question 3

Biceps branchii(long)

Answer 3

origin-supraglenoid tubercule of scapula and glenoid labrum
insertion-
nerve-musculocutaneous(C5-C6)
action- supinator, flexion of elbow ,flexor of arm, tested against resistance and all screwing movements and PREVENTS UPWARD DISP. OF HEAD OF HUMERUS

Question 4

Brachialis

Answer 4

origin-lower half of front of humerus including the anteromedial and anterolateral
and, medial and lateral intermuscular septa
insertion- coronoid and ulnar tuberosity and
nerve- musculocutaneous(motor) and radial nerve(proprioceptive)
action- flexion of forearm in elbow joint

Question 5

MUSCULOSUTANEOUS NERVE

Answer 5

Origin-lateral cord and lower axilla

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