Muscle Actions of the Upper Limb Flashcards
(19 cards)
Trapezius m.
upper fibers elevate, middle fibers pull it medially, lower fibers pull medial border downward.
Latissimus dorsi m.
extends, adducts, and medially rotates the arm.
Levator scapulae m.
raises medial border of the scapula aka elevates the scapula.
Rhomboid Major m.
raises medial border of the scapula upward and medially.
Rhomboid Minor m.
raises medial border of scapula upward and medially.
Pectoralis major m.
adducts arm and rotates it medially.
Pectoralis minor m.
depresses the shoulder or elevates the ribs if the scapula is fixed.
Subclavius m.
depresses the clavicle and stabilizes it.
Serratus anterior m.
draws the scapula forward.
Deltoid m.
abducts the arm.
Supraspinatus m.
abducts the arm.
Infraspinatus m.
laterally rotates the arm.
Teres major m.
medially rotates and adducts the arm.
Teres minor m.
laterally rotates the arm.
Subscapularis m.
medially rotates the arm.
Biceps brachii m.
supinator of the forearm, a flexor of the elbow, and weak flexor of the shoulder.
Coracobrachialis m.
flexes arm and is a weak adductor of the arm.
Brachialis m.
flexor of the elbow.
Triceps brachii m.
extensor of elbow joint.
