Posterior Muscles of Human Trunk (Neck, Shoulder, Thorax)

8 cards·by bpieri

Trapezius

Most superficial muscle of posterior thorax; extends head; raises, rotates and retracts scapula; fibers elevate and depress the shoulder

latissimus dorsi

broad, flat muscle of lower back, prime mover of arm extension, abducts and medially rotates arm, depresses scapula

infraspinatus

a rotator cuff muscle partially covered by deltoid and trapezius that laterally rotates the humerus, stabilizes shoulder

teres minor

inferior to infraspinatus, a rotator cuff muscle

teres major

located inferiorly to teres minor; extends, medially rotates, and abducts humerus

supraspinatus

obscured by trapezius; a rotator cuff muscle; assists abduction of humerus; stabilizes shoulder joint

lavator scapulae

located at back and side of neck, elevates and abducts scapula

rhomboids (major and minor)

rotates glenoid cavity downward, stabilizes scapula, pulls scapula medially