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Lecture 11
Axial Muscles
25
Anatomy
Undergraduate 2
09/29/2010

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Term
occipitofrontalis
Definition
-occipital frontal
-wrinkling forehead
Term
obicularis oculi
Definition
-surrounds orbit
-close eyes
Term
obicularis oris
Definition
-surrounds mouth
-close mouth, kissing
Term
zygomaticus major
Definition
-cheekbone to lips
-smiling
Term
depressor anguli oris
Definition
-mandible to lips
-frowning
Term
levator labii superioris
Definition
-maxilla to lips
-elevate upper lip
Term
depressor labii inferioris
Definition
-mandible to lips
-depress lower lip
Term
buccinator
Definition
-deep in cheek
-compresses cheek (chipmunk)
Term
platysma
Definition
-most superficial muscle of the neck
-tensing neck
Term
masseter
Definition
-elevate mandible
Term
medial pterygoid
Definition
-elevate mandible
-vertical muscles
Term
lateral pterygoid
Definition
-protract mandible
-horizontal muscles
Term
hyoglossus
Definition
-hyoid bone to tongue
-moves tongue
Term
genioglossus
Definition
-mandible to tongue
-moves tongue
Term
suprahyoid
Definition
-superior to hyoid
-swallowing
Term
infrahyoid
Definition
-inferior to hyoid
-swallowing
Term
sternocleidomastoid
Definition
-sternum to clavicle to mastoid
-flex/rotate neck
Term
scalenus medius
Definition
-middle scalene
-flex/rotate neck
Term
erector spinae group
Definition
-iliocostalis
-longissimus
-spinalis
-keep spine erect
Term
quadratus lumborum
Definition
-illium to throacic vertebrae to 12th rib
-stabalize core
-lateral flex of spine
Term
external oblique
Definition
rotate spine
Term
internal oblique
Definition
rotate spine
Term
transverse abdominus
Definition
rotate spine
Term
rectus abdominus
Definition
flex spine
Term
pelvic diaphragm
Definition
-levator ani
-coccygeus
-pubococcygeus
-support organs of the pelvis
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