Pectoralis Major

Origin: Clavicle, Sternum, Ribs 1-6, and External Oblique muscle (via  an aponeurosis)

Insertion: Humerus (Intertubercular groove and crest of greater tubercle)

Action: Shoulder Adduction, Medial Rotation, Flexion of an extended arm, Extension of a flexed arm, Horizonal Adduction

Innervation: C5-T1 (Medial and Lateral Pectoral Nerves)

EMG studies:

If this muscle is over used - check if these muscles are weak:

(Agonists) - <<LIST AGONISTS: HYPERLINKS TO ALL MUSCLES THAT HAVE SAME FUNCTION IN ANY MOTION LISTED BY MOTION>>

(Synergists) - <<LIST ALL SYNERGISTS>> 

If this muscle is over used - check if these muscles are tight:

(Antagonists) - <<LIST ANTAGONISTS: HYPERLINKS TO ALL MUSCLES THAT HAVE OPPOSITE FUNCTION IN ANY MOTION LISTED BY MOTION>>

If this muscle is tight - check if these muscles are tight as well

(Fascial Trains) - <<LIST MUSCLES THAT ARE ON SAME FASCIAL TRAIN: HYPERLINKS TO ALL AND FOR NOW LET'S USE THE NAME OF THE FASCIAL TRAIN PROVIDED BY THOMAS MYERS AND SITE>>

If this muscle is over used - check if these muscles are weak

(Functional Agonists) - << LIST PNF MOTIONS BY PATTERN AND THEN BREAK OUT EACH FUNCTIONAL MOVEMENT WE HAVE WORKED ON (SQUATTING, SPRINTING, PLANKING ETC.) >>