Appendicular Muscles Function, Bio 201

pectoralis minor

pectoral girdle; draws scapula forwards and down

serratus anterior

pectoral girdle; rotates scapula laterally and upward (punching and planks)

levator scapulae

pectoral girdle; elevates/adducts scapula

trapezius

pectoral girdle; rotates, raises, and retracts scapula

rhomboideus minor & major

pectoral girdle; stabilize scapula, retract (adduct) scapula (squaring the shoulders)

pectoralis major

prime mover of arm flexion, rotates arm medially and adducts arm

latissimus dorsi

prime mover of arm extension, adducts and medially rotates

deltoid

prime mover of arm abduction

teres major

synergist to latissimus dorsi (lats little helper)

supraspinatus

rotator cuff; initiates abduction of arm (humerus)

infraspinatus

rotator cuff; rotates arm laterally

teres minor

rotator cuff; rotates arm laterally

subscapularis

rotator cuff; rotates arm medially

brachialis

a major elbow (forearm) flexor

biceps brachii

flexes elbow and supinates forearm (rotates arm laterally)

triceps brachii

prime mover of elbow extension (forearm)

brachioradialis

synergist in flexing forearm

pronator quadratus

prime mover of forearm pronation

pronator teres

pronates forearm

supinator

supinates forearm