Arm and Elbow Muscles

2

Flexor muscles of ant compartment: ___x

as strong as extensors

Proximal attach: Short head - coracoid process; long head supraglenoid tubercle

Distal attach: tuberosity of radius and fascia of F/A via bicipital aponeurosis

Function: supinates F/A - most powerful supinator; in elbow extension,

acts as elbow flexor

Innervation:

Musculocutaneous:

C5, 6, 7 (BBC)

Biceps Brachii

Prox attach: distal ½ ant humerus

Distal attach: coronoid process/ulna

tuberosity

Function: flexes arm in all positions

Innervation: Musculocutaneous C5, 6, 7

Brachialis

Prox attach: coracoid process

Distal attach: middle 1/3 medial humerus

Function: assist with humeral flex and add

Innervation: Musculocutaneous C5, 6, 7

Coracobrachialis

Prox attach:

• Long head: infraglenoid tubercle

• Medial head: post humerus, distal to radial

groove; medial intermuscular septum

• Lateral head - post humerus, prox to radial

groove; lateral intermuscular septum

Distal attach:

• Olecranon process of ulna

Function: chief elbow extensor; long head

resists inf dislocation

Innervation: Radial n C6, 7, 8

Triceps brachii

Prox attach: lat epicondyle of humerus

Distal attach: Lat olecranon and superior

part of post ulna

Function: Assists tricep with elbow

extension; stabilizes elbow jt

Innervation: Radial n C7, 8, T1

Anconeus