Muscular System
occipitofrontalis action
raises eyebrows
occipitofrontalis nerve supply
facial nerve
frontal belly action
raises eyebrows
frontal bell nerve supply
facial nerve
orbicularis oculi action
closes eye
zygomaticus major and minor action
raises lateral corners of mouth upward (smiling)
risorius action
draws corner of lip laterally (tenses lip)
levator labii superioris action
opens lips
depressor labii inferioris
draws lips inferiorly
depressor anguli oris
draws corner of mouth down and laterally (grimace)
orbicularis oris action
closes lip (kissing, purses)
mentalis action
wrinkles chin
buccinators action
compress check (sucking and blowing)
platysma action
tenses skin of neck
orbicularis oculi nerve supply
facial nerve
zygomaticus major and minor nerve supply
facial nerve
risorius nerve supply
facial nerve
levator labii superioris nerve supply
facial nerve
depressor labii inferioris nerve supply
facial nerve
depressor anguli oris nerve supply
facial nerve
orbicularis oris nerve supply
facial nerve
mentalis nerve supply
facial nerve
buccinators nerve supply
facial nerve
platysma nerve supply
facial nerve
name the four muscles of chewing
masseter, temporalis, medial pterygoid, lateral pterygoid
masseter action
chewing, primer mover of jaw closure
temporalis action
chewing, closes jaw
medial pterygoid action
chewing, mandible side to side (grinding)
lateral pterygoid action
chewing, grinding moves of lower teeth
masseter nerve supply
trigeminal nerve
temporalis nerve supply
trigeminal nerve
medial pterygoid nerve supply
trigeminal nerve
lateral pterygoid nerve supply
trigeminal nerve
name the muscles used for tongue movements
genioglossus, hyoglossus, styloglossus
genioglossus action
protracts tongue
hyoglossus action
depress tongue
styloglossus action
retract and elevates tongue
genioglossus nerve supply
hypoglossal nerve
hyoglossus nerve supply
hypoglossal nerve
styloglossus nerve supply
hypoglossal nerve
sternocleidomastoid action
flexes and laterally rotates head. tilts head to opposite side. both contraction produces neck flexion. one contraction tilts head to opposite side
sternocleidomastoid description
fleshy parts on either side of the neck
sternocleidomastoid origin
manubrium of sternum and medical portion of clavicle
sternocleidomastoid insertion
mastoid process of temporal bone and superior nuchal line of occipital bone
sternocleidomastoid nerve supply
accessory nerve (cranial nerve x)
scalenes origin
transverse processes of cervical vertebrae
scalenes insertion
anterolaterlly on first two ribs
scalenes action
elevate first to ribs
which muscle aids in inspiration
scalenes
scalense nerve supply
cervical spinal nerves