Anantomy

Human only

13 cards·by jonesj64

a movement performed by a muscle

action

cause a specific movement of the body (prime movers)

agonist

opposes, reverses, or steadies a movement

antagonist

assist prime movers by adding extra force and preventing unwanted movement (stabilizers) or modifying movement direction

synergists

immobilizers of bone or muscle's origin

fixators

rectus, tranverse, oblique

fiber orientation

action: elevates eyebrows, wrinkles forehead

Epicranius (frontal and occipital)

action: closes eyelids

Orbicularis Oculi

action: closes lips

Orbicularis Oris

action: pouts (lower lip)

Mentalis

action: smile

risorius

action: compresses cheeks (whistle, suckling, holds cheeks against teeth while chewing)

Buccinator

action: tenses skin of neck; draws lip and angle of mouth down in expression of surprise

Platysma