Brachial region muscles

where is brachial region?

#1 muscle, origin, insertion, action(s)

Biceps brachii

1a - short head, origin: superior glenoid cavity

1b - long head, origin: coracoid process of scapula

insertion: radial tuberosity

action: elbow flexion

#2 muscle, origin, insertion, action(s)

Triceps brachii

2a - long head, origin: inferior glenoid cavity

2b - medial head, origin: proximal humerus

2c - lateral head, origin: shaft of humerus

insertion: olecranon process of ulna

action: elbow extension

#4A muscle, origin, insertion, action(s)

Brachialis

origin: shaft of humerus

insertion: coronoid process of ulna

action: elbow flexion

#3 muscle, origin, insertion, action(s)

Coracobrachialis - no elbow motion

origin: coracoid process of scapula

insertion: shaft of humerus (medial)

action: *shoulder flexion

#4 muscle, origin, insertion, action(s)

Brachioradialis

origin: lateral epicondyle of humerus

insertion: styloid process of radius'

action: elbow flexion