Shoulder Muscles - Exam 1 Flashcards
deltoid origin
lateral clavicle, acromion, scapular spine
deltoid insertion
deltoid tuberosity of the humerus
deltoid action
clavicular - flexion of arm, medial rotation of arm
acromial - ABduction of arm
spinal - extension, lateral rotation
teres major origin
inferior angle of scapula
teres major insertion
medial lip of inter tubercular groove
teres major actions
medial rotation of arm, ADduction
rotator cuff muscles
supraspinatus, infraspinatus, teres minor, subscapularis
supraspinatus origin
supraspinous fossa
supraspinatus insertion
greater tuberosity of humerus
supraspinatus actions
initiates ABduction (0-15 degrees), supports shoulder joint
infraspinatus origin
infraspinous fossa
infraspinatus insertion
greater tuberosity
infraspinatus actions
lateral rotation of arm, supports shoulder joint
teres minor origin
middle lateral border of scapula
teres minor insertion
greater tuberosity
teres minor actions
lateral rotation of arm, supports shoulder joints
subscapularis origin
sub scapular fossa
subscapularis insertion
lesser tuberosity
subscapularis actions
medial rotation of arm, ADduction, supports shoulder joint
