shoulder muscles moving the shoulder Flashcards
latissimus dorsi origin, insertion, innervation
o - spinous processes T7-L5, iliac crest, sacrum
i - intertubecular groove
in - thoraco-dorsal N
latissimus dorsi action
adduct, extend, internal rotation of arm
pactoralis major origin, insertion, innervation
o - clavicle, sternum, ribs 1-6
i - lateral lip of intertubecular groove
in - medial and lateral pectoral N
pectoralis major action
adduct, flex, internal rotation of arm
teres major origin, insertion, innervation
o - inferior angle of scapula
i - medial lip of interubecular groove
in - lower subscapular N
teres major action
adduct, extend, internal rotation of arm
deltoid origin, insertion, innervation
o - clavicle, acromion, spine of scapula
i - deltoid tuberosity
in - axillary N
deltoid action
anterior fibres: flex, internal rotation GHJ
middle fibres: abduct GHJ
posterior fibres: extend, external rotation GHJ
supraspinatus origin, insertion, innervation
o - supraspinous fossa
i - greater tuberosity
in - suprascapular N
supraspinatus action
abduct arm - abduction starter
weak external rotation
infraspinatus origin, insertion, innervation
o - infraspinous fossa
i - greater tuberosity
in - suprascapular N
infraspinatus action
external rotation of arm
teres minor origin, insertion, innervation
o - inferior lateral border of scapula
i - greater tuberosity
in. - axillary N
teres minor action
external rotation of arm
subscapularis origin, insertion, innervation
o - subscapular fossa
i - lesser tuberosity
in - upper and lower subscapular N
