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A&PFinal-facemuscles
| Question | Answer |
|---|---|
| what do the lips form the focus of | the facial muscles |
| the lips form the ___ of the facial muscles | focus |
| explain why the lips form the focus of the facial muscles | their movement largely determines their function in both facial expression and speech |
| what are the lips comprised of | muscles and mucus membrane with rich vascular supply |
| name 3 major landmarks of the lips | cupid's bow, columella, philtrum |
| name the muscles of the lips | orbicularis oris, Risoris and buccinator muscles, |
| a single muscle encircling the mouth opening | orbicularis oris |
| what are the paired upper and lower muscles of the orbicularis oris called | orbicularis oris superior and orbicularis oris inferior |
| explain how the upper and lower orbicularis oris act | like a drawstring to pull the lips closer together and effect the labial seal |
| pulling the lips closer together effects the what | labial seal |
| what acts like a drawstring to pull the lips closer together | the upper and lower orbicularis oris |
| how is the orbicularis oris innervated | by the VII cranial nerve |
| what does the orbicularis oris serve for many other muscles | the point of nsertion |
| what does the interaction between orbicularis oris and the muscles that insert into it produce | our various facial gestures |
| what produces our various facial gesture | the orbicularis oris and its interaction with the muscles that insert into it |
| where do risoris and buccinator muscles insert | into the corner of the mouth |
| what is the function of the risoris and buccinator muscles | to retract the lips |
| what does the risoris muscle facilitate | smiling and grinning |
| risoris muscles courses ____ and inserts in the _____ | forward; corner of the mouth |
| what are the dominant muscles of the cheeks | buccinator muscles |
| do the risoris and buccinator muscles have the same course? | yes-both course forward |
| the buccinator muscles are primarily involved in _____ | mastication |
| which muscles contraction also constricts the oropharynx | buccinator muscle |
| buccinator muscles are used to mood food onto where | the grinding surfaces of the molars |
| contraction of the buccinator muscles also contricts the _____ | oropharynx |
| list the cheek muscles | levator labii superioris alaeque nasi, levator labii superiors, zygomatic minor, zygomatic major, levator anguli oris |
| what is the major responsibility for the levator labii superioris alaeque nasi? where is it? | elevation of the upper lip; along the sides of the nose |
| what draws the corner of the mouth up and in | levator anguli oris |
| levator anguli oris inserts in the ___ and ___ __ | upper and lower lips |
| what inserts in the corner of the orbicularis oris | zygomatic major |
| the zygomatic major ___ and ____ the angle of the mouth | elevates; retracts |
| is the zygomatic minor or zygomatic major associated with smiling | zygomtaic major |
| list the chin/lower jaw muscles | depressor labii inferioris, depressor anguli oris, mentalis, platysma |
| contraction of the _______ opens the mouth | depressor labii inferioris |
| contraction of the depressor labii inferioris pulls the lips ___ and ____ | down; out |
| fan-like muscle | depressor anguli oris |
| inserts in the orbicularis oris and corner of the upper lip | depressor anguli oris |
| what does contraction of the depressor anguli oris do | lowers the corners of the mouth and compresses the upper lip against the lower lip |
| what muscle produces a frown and how | depressor anguli oris by compressing the upper lip against the lower lip |
| where does the mentalis muscle inert into | the chin |
| what does the mentalis muscle produce | pouting |
| contraction of the mentalis ____ and wrinkles the chin and ___lower lip out=pouting | elevates, pulls |
| what is a muscle of the neck (lower jaw and neck) | platysma |
| what does the platysma function as | a mandibular depressor |
| platysma arises from the ____ and inserts where? | pectorals; corner of the mouth and lower mandible |
| platysma assists with the depression of what? | the mandible |
| muscles of the tongue can be catagorized into which two catagories | intrinsic muscle and extrinsic muscles |
| what is the difference between intrinsic and extrinsic | intrinsic-provide the fine, graded control of the articulatory gesture; extrinsic-move the tongue as a unit in the general region desired |
| list the intrinsic muscles | superior longitudinal, inferior longitudinal, transverse, vertical |
| list the extrinsic muscles | genioglossus, hyoglossus, styloglossus, chondorglossus, palatoglossus |
| what direction do intrinsic muscles run | longitudinally, transversely, vertically |
| instrinsic muscles interact in a complex fashion producing what | rapid articulations needed for speech and non-speech activities |
| courses along the length of the tongue, comprising the upper layer of the tongue | superior longitudinal muscle |
| what does teh superior longitudinal muscle elevate | the tip of the tongue |
| what causes the tongue to be pulled toward the one side | if one superior longitudinal muscle s contracted without the other |
| occupies the lower sides of the tongue | inferior longitudinal muscle |
| the inferior longitudinal muscle pulls the tip of the tongue ___ and assits with ____ of the tongue | downward, retraction |
| what is unilateral contraction | causes the tongue to turn toward the contracted side and downward |
| unilateral contraction causes the tongue to turn where/ | toward the contracted side and downward |
| what muscle provides a mechanism for narrowing the tongue | transverse |
| how does the transverse muscle narrow the tongue | by pulling the edges of the tongue toward the midline |
| vertical muscles run at right angles to ____ muscles | transverse |
| what muscles flatten the tongue | vertical muscles |
| contraction of which muscle will pull the tongue down into the floor of the mouth | vertical muscles |
| the fibers of the ___ and ____ muscles interweave | transverse and vertical |
| which extrinsic muscle is the primary mover of the tongue | genioglossus |
| what makes up most of the tongue's deeper bulk | genioglossus |
| contraction of genioglossus ___ fibers=retraction | anterior |
| contraction of genioglossus ___fibers =protrusion | posterios |
| what does contraction of both anterior and posterior portions of genioglossus do | draw the tongue down and toward the floor of the mouth |
| arises from the greater cornu and lateral corpus of hyoid bone inserting into the sides of the tongue | hyoglossus |
| contraction of the hyoglossus muscle pulls the tongue _____ | down |
| originates from the styloid process of the temporal bone | styloglossus |
| styloglossus 2 portions interweaves with what? | inferior longitudinal and hyoglossus |
| chondroglossus:____the tongue | depresses |
| pataloglossus duel purposes | depressing the soft palate and elevating the back of the tongue |
| what muscle makes up the anterior faucial pillar | pataglossus |
| what muscles are among the strongest in the body | muscles of mastication |
| what are the 3 catagories of muscles of mastication | mandibular elevators, muscles of protrusion, mandibular depressors |
| what does the mandibular elevators consist of | masseter, temporalis, medial ptervygoid |
| what is visible when contracted | masseter |
| what does the temporalis do | elevates and retracts the mandible |
| what does the medial ptervgoid act in conjunction with | masseter |
| what is the muscle of protrusion | lateral ptervygoid |
| prottrudes the mandible aiding in the grinding action | lateral ptervygoid |
| list the mandibular depressors | digastricus, mylohyoid, geniohyoid, platysma |
Created by:
deborahpuckett