KIN 2320 Lecture Notes - Lecture 27: Medial Pectoral Nerve, Long Thoracic Nerve, Serratus Anterior Muscle

• School: University of Manitoba
• Department: Kinesiology
• Course: KIN 2320
• Professor: Steven R.Passmore

Document Summary

4 anterior axio-appendicular (thoraco-appendicular or pectoral) move from the pectoral gridle: pectoralis major, pectoralis minor, subclavius, and serratus anterior. The fan shaped pectoralis major covers the superior part of the thorax. The sternocostal head is much larger, its lateral border forms most of the anterior wall of the axilla (arm pit) with its inferior border forming the anterior axillary fold. The pectoralis major and adjacent deltoid form the narrow deltopectoral groove, in which the cephalic vein runs. However, the muscles diverge slightly from each other superiorly and along with the clavicle from the clavipectoral (deltopectoral) triangle. Medial and lateral nerves adducts and medially rotates shoulder joint. The triangular pectoralis minor lies in the anterior wall of the axilla, where it is almost completely covered by the pectoralis major (deep to pec major). Stabilizes the scapula and is used when stretching the upper limb forward to touch an object that is just out of reach.