So you guys don't think that different angles of approach stimulate the fibers of a given muscle group to a greater or lesser degree? You don't think that wide grip bench puts more emphasis on the outer sweep of the pec than say, standard or close grip bench? Because I can feel it when I do the different movements...
"First will you show me on an anatomy chart where the upper chest or upper inner pectoral are located? ......... What? Can't do it?"
Sure phreez, its the area of the pec where the clavicle and sternum intersect.
Pectoralis major
Origin:
medial 1/3 of clavicle
anterior aspect of manubrium & length of body of sternum
cartilaginous attachments of upper 6 ribs
external oblique's aponeurosis
Insertion:
lateral lip of bicipital groove to the crest of the greater tubercle
clavicular fibers insert more distally; sternal fibers more proximally
Action:
adducts humerus
medially rotates humerus
flexion of the arm from extension (clavicular portion)
Blood:
pectoralis branch of thoracoacromial artery (runs with lateral pec. nerve)
lateral thoracic artery (lesser supply, and runs with medial pectoral nerve)
Nerve:
lateral pectoral nerve, C5,6,7 to clavicular portion
medial pectoral nerve, C8,T1 to sternal portion