Only 2 are cranial and the rest are caudal group
Biceps brachii m. (cranial group)
O: supraglenoid tubercle of the scapula
I: ulnar and radial tuberosities
N: musculocutaneous n.
A: elbow flexion, shoulder extension
Internal tendon
inside biceps brachii m.
Biceps brachii m. (Eq.) - lacertus fibrosis
lacertus fibrosis is a tendon-like structure b/w the biceps and the extensor carpi radialis m.
Brachialis m. (cranial group)
O: lateral aspect of proximal 1/3rd of humerus
I: ulnar and radial tuberosities
N: musculocutaneous n.
A: elbow flexion
Triceps brachii m.
O: long head: caudal border of scapula; lateral head: tricipital line of humerus; accessory head: neck of humerus; medial head: crest of lesser tubercle
I: olecranon
A: shoulder flexion (long head only) and extension of elbow
N: radial n.
Long head of the triceps brachii m.
O: caudal border of scapula
I: olecranon
A: shoulder flexion (long head only) and extension of elbow
N: radial n.
Lateral head of the triceps brachii m.
O: tricipital line of humerus
I: olecranon
A: extension of elbow
N: radial n.
Medial head of the triceps brachii m.
O: crest of lesser tubercle
I: olecranon
A: extension of elbow
N: radial n.
Accessory head of the triceps brachii m. (Car., Bov.)
O: neck of humerus
I: olecranon
A: extension of elbow
N: radial n.
Tensor fascia antebrachii m.
O: fascia of lateral m. latissimus dorsi
I: olecranon
A: elbow extension
N: radial n.
Anconeus m.
O: lateral supracondylar crest, medial and lateral humeral epicondyles
I: lateral aspect of proximal ulna
A: elbow extension
N: radial n.