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Chapters 4&5-Muscles
Muscles
40
Anatomy
2nd Grade
11/14/2012

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Cards

Term
Epicranial(Occipital-frontalis)- action/location
Definition
On scalp, two bellies, when both contract the eyebrows raise, when just front belly contracts the eyebrows "frown"
Term
Orbicularis Oculi-action/location
Definition
surrounds eye, closes the eye
Term
Currugator Supercilii-action/location
Definition
over eyebrows, pull together/down to "frown"
Term
Orbicularis oris-action/location
Definition
-surrounds mouth
-allows it to close, purse, pout, grimace
Term
Levator labii superioris-action
Definition
raises upper lip
Term
Levator labii superioris alaeque-action/location
Definition
raises upper lip, flares nostrils, mesial to the Levator labii superioris
Term
Zygomaticus major-action
Definition
assists in smiling
Term
Zygomaticus minor-action
Definition
raises upper lip, assists in smiling
Term
Lavator anguli oris-action
Definition
pulls up corner of the mouth for smile
Term
Buccinator-action
Definition
pulls angle of the mouth laterally, shortens cheek
Term
Risorius-action
Definition
retracts lips laterally
Term
Depressor anguli oris-action
Definition
pulls corner of the mouth down
Term
Depressor labii inderioris-action
Definition
pulls lower lip down
Term
Mentallis-action
Definition
pulls skin on chin up, causes lower lip to protrude, narrows vestibule area
Term
Stylopharyngeus-location
Definition
muscle of the pharynx, seen from back
Term
Pharyngeal constrictors-location
Definition
constricts pharynx
Term
Platysma-action
Definition
pulls corner of the mouth down, pulls skin on chest up
Term
Trapezius-action
Definition
raises and pulls shoulders back, if only upper part contracts then if extends and turns head to one side
Term
Sternocleidomastoid-action
Definition
if both sides contract the head will flex, if only once side contracts head rotates and tilts to opposite side
Term
Masseter-action
Definition
elevation of mandible, helps with chewing
Term
Temporalis-action
Definition
elevation and retraction of the mandible
Term
Medial pterygoid-action
Definition
elevates mandible
Term
lateral pyerygoid-action
Definition
if both sides contract the mandible protrudes, if one side contracts the mandible laterally deviates
Term
What are the two bellies of the digastric muscle? Location?
Definition
anterior and posterior belly, under the chin
Term
mylohyoid-location/action
Definition
helps form floor of the mouth, elevates tongue
Term
Geniohyoid-origin/location
Definition
-originates in the genial tubercles
-floor of the mouth
Term
What are the 4 suprahyoid muscles? What is their function?
Definition
1.digastric
2.mylohyoid
3.geniohyoid
4.stylohyoid
*above the hyoid bone, elevate hyoid and larynx when swallowing*
Term
What are the 4 infrahyoid muscles? What is their action?
Definition
1.omohyoid
2.sternohyoid
3.sternothyroid
4.thyrohyoid
*below hyoid bone, main function is to depress the hyoid*
Term
Genioglossus-action
Definition
protrudes tongue, deepens portions of the tongue
Term
hyoglossus-action
Definition
depresses tongue
Term
Styloglossus-action
Definition
retracts tongue
Term
Palatoglossus-location/action
Definition
-anterior pillar
-elevates and arches tongue, depresses soft palate towards tongue
Term
palatopharyngeus- location/action
Definition
-posterior pillar
-moves palate posterioinferiorly, and pharyngeal wall anterior-superiorly
Term
Levator veli palatini-action
Definition
raises soft palate to constrict posterior pharyngeal wall
Term
Tensor veli palatini-action
Definition
tenses and slightly lowers soft palate
Term
Uvula-action
Definition
soft palate closely adapts to posterior pharyngeal wall
Term
What are the 4 muscles of mastication?
Definition
1.massetor
2.temporalis
3.medial pterygoid
4.lateral pyerygoid
Term
What are the two groups of muscles of the tongue? Where are they?
Definition
extrinsic-under tongue
intrinsic-make up tongue
Term
What are the three extrinsic muscles of the tongue?
Definition
1.genioglossus
2.hyoglossus
3.styloglossus
Term
What are the 4 intrinsic muscles of the tongue?
Definition
1.superior longitudinal
2.inferior longitudinal
3.transverse
4.vertical
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