Brachial Muscles

Question 1

Coracobrachialis (oifi)

Anterior compartment

Answer 1

Coracoid process
Medial mid humerus
Flexes humerous
Musculocutaneous nerve

Question 2

Brachialis

Anterior compartment

Answer 2

Anterior surface of humerus distal half
Ulnar tuberosity
Flexion of elbow
Musculocutaneous nerve

Question 3

Biceps brachii

Anterior compartment

Answer 3

Corocoid process, supraglenoid tubercle
Radial tuberosity
Flexion of humerus, and Pronation
Musculocutaneous nerve

Question 4

Tríceps brachii

Posterior compartment

Answer 4

Origin: Infraglenoid tubercle, joint capsule of the shoulder (long head), oblique ridge ridge in upper half of the posterior humeral shaft (lateral head), posterior and medial surfaces of the humeral shaft below the point of insertion of the teres major to just proximal to the trochara.
Insertion: upper surface of the olecranon process of ulna and the antebrachial fossa
Function: Extension of elbow, a little with flexion if shoulder
Radial nerve