Shoulder mm Flashcards
O/I for trapezius
O:Med 1/3 of superior nuchal line, inion, nuchal lig, SP’s C7-T12
I: Lat 1/3 clavicle, acromion, spine of scapula
Trapezius Action
UPPER: rotates scapula sup
MIDDLE: retracts scapula
LOWER: depress shoulder
UNI: flex, ipsilateral lat flex, contralateral rotation
Levator Scapula O/I
O: C1-C4 TVPs
I: sup part of scapula’s med border
Latissimus Dorsi O/I
O: SP’s of T6-T12, thoracolumbar fascia, iliac crest, ribs 8/9-12
I: Floor of the bicipital groove of humerus
Levator Scapula Action?
Action: Downward rotation of scapula. Elevates scapula
Latissimus Action?
Extension
Adduction
Med rotation
Teres Major O/I?
O:Post inf angle of scapula
I: Med lip of bicipital groove
Teres Major Action?
Adducts and med rotation of shoulder
SITS mm O/I
Supraspinatus:
O: Supraspinous fossa of scapula
I: Greater tubercle
Infraspinatus:
O: Infrasoinous fossa of scapula
I: Greater tubercle
Teres Minor:
O: upper 2/3 of lat border of scapula
I: Greater tubercle
Subscapularis”
O: Subscapular fossa
I: Lesser Tubercle
SIT’s actions?
S: ABduct shoulder
I: lat rotation, can adduct shoulder
T: Lat rotation, can adduct shoulder
S: Med rotation
Pec Major O/I
O:
Clavicular head: Ant med 1/2 of clavicle
Sternocostal head: Ant sternum, sup 6 costal cartilages, aponeurosis of ex obliques
I: Lat lip of bicipital groove
Pec Major Action?
Adducts/med rotation of shoulder
Clavicular head: Flex shoulder
Sternocostal head: extends shoulder (from flexed position)
Pec Minor O/I
O: Ribs 3-5 near costal cartilages
I: Coracoid process
Pec Minor Action?
Stabilizes scapula (by drawing it inf and ant)
Deltoid O/I
O: Lat 1/3 of clavicle, acromion, spine of scapula
I: Deltoid tuberosity
