Term | Definition |
abductor pollis longus | abducts at point of thumb and wrist |
adductor longus | adduction, flexion and medial rotation at hip |
adductor magnus | adduction at hip |
biceps brachii | flexion at elbow and shoulder |
biceps femoris | flexion at knee |
brachialis | flexion at elbow |
briachioradialis | flexion at elbow |
buccinator | compresses cheeks |
coracobrachialis | adduction and flexion at shoulder |
deltoid | whole muscle; abduction at shoulder |
depressor labii inferioris | elevates upper lip |
erector sipnae | extends neck |
extensor carpi radialis breris | extension and abduction at wrist |
extensor carpi radialis longus | extension and abduction at wrist |
extensor carpi ulnaris | extension and adduction at wrist |
extensor digitorum | extension of fingers at joints 2-5 |
extensor digitorum longus | extension of joints of toes 2-5 |
extensor hallucis longus | extension at joints of great toe |
extensor pollicis brevis | extension at joints of thumb; abduction at wrist |
external abdominal oblique | compresses abdomen, depresses ribs and flexes or binds spine |
external intercostalis | elevates ribs |
fibularis brevis | extension of foot and extension at ankle |
fibularis longus | eversion of foot and extension at ankle; supports longitudinal arch |
flexor carpi radialis | flexion and abduction at wrist |
flexor carpi ulnaris | flexion and abduction at wrist |
flexor digitorum longus | flexion at joints of toes 2-5 |
flexor digitorum profundis | flexion at distal interphalangeal joints and to a lesser degree, promixal interphalangeal joints and wrist |
flexor digitorum superficialis | flexion at proximal interphalangeal, metacarpophalangeal and wrist joints |
flexor hallucis longus | flexion at joints of great toe |
flexor pollicus longus | extension at joints of thumb, abduction at wrist |
gastrochemius | extension at ankle, inversion of foot, and flexion at knee |
gluteus maximus | extension and lateral rotation at hip |
gluteus medius | abduction and medial rotation at hip |
gracilis | flexion at knee, adduction and medial rotation at hip |
iliopsoas | flexion at hip |
infraspinatus | lateral rotation at shoulder |
internal abdominal oblique | compresses abdomen, depresses ribs and flexes or bends spine |
latissimus dorsi | extension, adduction, and medial rotation at shoulder |
levator labii superioris | elevates upper lip |
levator scapulae | elevates scapula |
masseter | elevates mandible and closes the jaw |
nasalis | compresses bridge, depresses tip of nose and elevates corners of nostrils |
occipitofrontalis | raises eyebrows, wrinkles forehead and tenses/retracts scalp |
orbicularis occuli | closes eye |
orbicularis oris | compresses, purses lips |
palmaris longus | flexion at wrist |
pectoralis minor | depresses and protracts shoulder |
pectoralis major | flexion, adduction, and medial rotation at shoulder |
popliteus | medial rotation of tibia; flexion at knee |
pronator teres | pronation |
rectus abdominus | depresses ribs, flexes vertebral column, compresses abdomen |
rectus femoris | extension at knee; flexion at hip |
rhomboideus major | adducts scapula and performs downward rotation |
rhomboideus minor | adducts scapula and performs downward rotation |
rhisoris | draws corner of mouth to side |
sartorius | flexion at knee, flexion and lateral rotation at hip |
semitendinosus | flexion at knee; extension and medial rotation at hip |
serratus anterior | protracts shoulder; rotates scapula |
soleus | extension at ankle |
sternocleidomastoid | together, they flex the neck; alone, one side |
subscapularis | medial rotation at shoulder |
supinator | supination |
supraspinatus | abduction at the shoulder |
temporalis | elevates mandible |
tensor fasciae latae | flexion and medial rotation at shoulder |
teres major | extension, adduction, and medial rotation at shoulder |
teres minor | lateral rotation at shoulder |
tibialis anterior | flexion at ankle; inversion of foot |
trapezius | depends on active region and state of other muscles; may (1) elevate/retract/depress or rotate scapula upward (2) elevate clavicle or (3) extend neck |
transversus abdominis | compresses abdomen |
triceps brachii | extension at elbow |
vastus intermedius | extension at knee |
vastus lateralis | extension at knee |
vastus medialis | extension at knee |
zygomaticus major | retracts and elevates corner of mouth |
zygomaticus minor | retracts and elevates upper lip |