Infraspinatus Muscle - Attachments, Actions & Innervation
Subscapularis Muscle – Attachments, Action & Innervation
The subscapularis is a triangular muscle that fills the subscapular fossa. The Subscapularis muscle is one of the rotator cuff muscles, helping to stabilize the head of the humerus in the glenoid fossa during shoulder movements.
Attachments of Subscapularis Muscle: Origin & Insertion
Origin: (proximal attachments)
Subscapular fossa of the scapula.
Insertion: (distal attachments)
Lesser tubercle of humerus.
Check out this expert guide on learning the anatomy of the arm and shoulder muscles (step-by-step walkthrough).
Actions of Pectoralis Major Muscle:
Medially rotates the arm at the shoulder (glenohumeral) joint.
Innervation of Biceps Brachii:
Upper and lower subscapular nerves.
C5, C6, and C7.
Interactive quiz with the muscles that act on the arm
Muscles That Act On The Anterior Arm