Pectoralis Minor Muscle
Serratus Anterior Muscle
Attachments of Serratus Anterior Muscle: Origin & Insertion
Origin: (proximal attachments):
Anterior surfaces of the first 8 or 9 ribs.
Insertion: (distal attachments):
Anterior surface of medial border of scapula.
Actions on the Shoulder:
Nerve to Muscle and its Spinal Segment:
Long thoracic nerve (C5-C7).
Muscles That Act On The Posterior Shoulder