Muscles with parts that run through the axilla

Question 1

Biceps brachii

Answer 1

Origin:

• Long head - supraglenoid tubercle of scapula;
• Short head - apex of coracoid process

Insertion:

• Tuberosity of radius

Innevation:

• Musculocutaneous nerve (C5, C6)

Function:

• Powerful flexor of the forearm at the elbow joint and supinator of the forearm;
• Accessory flexor of the arm at the glenohumeral joint

Question 2

Coracobrachialis

Answer 2

Origin:

• Apex of coracoid process

Insertion:

• Linear roughening on mid shaft of humerus on medial side

Innervatoin:

• Musculocutaneous nerve (C5, C6, C7)

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Question 3

Brachialis

Answer 3

Origin:

• Anterior aspects of humerus (medial and lateral surfaces) and adjacent inter muscular septae

Insertion:

• Tuberosity of the ulna

Innervation:

• Musculocutaneous nerve (C5, C6); small contribution by the radial nerve (C7) to lateral part of muscle

Fucntion:

• Powerful flexor of the forearm at the elbow joint