Human Anatomy: Muscle Groups

Human Anatomy

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Muscle Function & Other Pertinent Medical Information
- TRICEPS -
ORIGIN:	Long head: infraglenoid tubercle of scapula. lateral head: upper half posterior humerus (linear origin). medial head: lies deep on lower half posterior humerus inferomedial to spiral groove and both intermuscular septa
INSERTION:	Posterior part of upper surface of olecranon process of ulna and posterior capsule
ACTION:	Extends elbow. Long head stabilizes shoulder joint. medial head retracts capsule of elbow joint on extension
NERVE:	Radial nerve (C7, 8) (from posterior cord ), four branches

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