Pectoralis Major Muscle - Attachment, Action & Innervation
Biceps Brachii – Attachments, Action & Innervation
Biceps brachii is one of the main muscles of the upper arm which acts on both the shoulder joint and the elbow joint. It derives its name from the fact that it consists of two parts (heads).
Attachments of Biceps Brachii: Origin & Insertion
Origin: (proximal attachments)
a. Long head: supraglenoid tubercle of the scapula.
b. Short head: coracoid process of the scapula.
Insertion: (distal attachments)
a. Radial tuberosity.
b. Bicipital aponeurosis to the fascia on the medial side of the forearm.
Actions of Biceps Brachii:
b. Flexes forearm at elbow.
c. Supinates forearm at elbow.