obliques
compression of abdomen, flexion, and rotation of trunk
transverse abdominis
compression of abdomen
rectus abdominis
flexion of trunk, compression of abdominal wall
intercostals (external and internal)
elevation and depression of ribs
diaphragm
open thoracic cavity for lungs during inspiration
frontalis
raises eyebrows
occipitals
pulls scalp posteriorly
temporalis
closes jaw, retracts mandible
masseter
closes jaw
zygomaticus
elevates corners of mouth
buccinator
compression of cheek
platysma
tenses skin of neck; depression of lower lip
orbicularis oculi
closes eyes
orbicularis oris
closes and protrudes lips
levator labii superioris
elevation of upper lip
depressor labii inferioris
depression of lower lip
sternocleidomastoid
flexion and rotation of neck
scalenes
elevation of ribs 1&2; rotation of neck
serratus anterior
abduction and rotation of scapula
rhomboids
adduction and elevation of scapula
splenius
rotation of head; extension of neck
digastric
elevation of hyoid; opens mouth
mylohyoid
elevation of hyoid and floor of mouth
geniohyoid
elevation and protraction of bone
sternohyoid
depression of hyoid and larynx
sternothyroid
depression of hyoid and larynx
thryrohyoid
depression of hyoid; elevation of larynx