Face
closes eye in blinking,
squinting, and sleep
ORBICULARIS OCULI
Unilateral action tilts head slightly
upward and toward the opposite side
STernoclydomastoid
Elevates scapula if cervical vertebrae are
fixed
LEVATOR SCAPULAE
Extends thigh at hip as in stair climbing
(rising to next step) or running and walking
Gluteus maximus
Encircles mouth, closes lips
ORBICULARIS ORIS
Extends and
laterally flexes neck
Trapezius
Adducts and medially rotates humerus
LATISSIMUS DORSI
Extends
knee
rectus femoris
Compresses cheek against teeth and gums
buccinator
Prime mover of inspiration (responsible for about
two-thirds of air intake)
Diaphragm
flex and medially rotate arm; lateral fibers
abduct arm
Deltoid
Plantar flexes foot
gastrocnemius
Elevation of mandible
masseter
Flexes lumbar region of vertebral column,
producing forward bending at the waist
Rectus Abdominus
Extends elbow; long head extends and adducts
humerus
triceps
steadies leg on ankle during standing
soleus
Elevation, retraction, and lateral and medial excursion
of the mandible
Temporalis
Supports abdominal viscera
against pull of gravity
External abdominal obliques
Antagonistic to triceps
biceps
Flexes
knee; extends hip; elevates trunk from
stooping posture
biceps femoris