ARTICULATORY SYSTEM PHYSIOLOGY
EXAM WITH COMPLETE ANSWERS {
GRADED A+}
Muscles of the face - ✔✔innervated by VII facial nerve
orbicularis oris - ✔✔main muscles acting on the lips
-close mouth and pucker lips; strength
difficulty with closure and strength of the lips - ✔✔drooping,
asymmetry, cleft lip, drooling
transverse facial muscles - ✔✔buccinator and risorious
buccinator and risorious - ✔✔contract to smile
buccinator - ✔✔main muscle of the cheek
-compress the lips and cheek against the teeth; draws corner of
mouth laterally
,-origin at the pteryomandibular raphe (also superior pharyngeal
constrictor)
risorious - ✔✔superficial to buccinator
-helps draw the mouth laterally
test lips - ✔✔pucker
smile
press lips on tongue depressor to test strength
angular facial muscles - ✔✔attach to orbicular iris at an angle
elevators:
-levator labii alaeque nasi
-levator labii superioris
-zygomatic minor
-zygomatic major
depressors: pulls down on orbicularis iris
-depresses labii inferioris
, vertical facial muscle - ✔✔mentalis
depressor anguli oris
levator anguli oris
tongue - ✔✔innervated by XII hypoglossal
-primary articulator (shapes oral cavity and changes resonance
characteristics of oral and associated cavities)
-valve-like to stop flow of air (stops) or acts as a noise-generator
while approximating teeth, alveolar ridge, and palate (fricative)
-divided into extrinsic (gross movements) and intrinsic (fine
movements) musculature
extrinsic muscles of the tongue - ✔✔move the tongue in the
general region desired (gross movements)
-genioglossus
-styloglossus
-palatoglossus
-hyoglossus
-chondroglossus
EXAM WITH COMPLETE ANSWERS {
GRADED A+}
Muscles of the face - ✔✔innervated by VII facial nerve
orbicularis oris - ✔✔main muscles acting on the lips
-close mouth and pucker lips; strength
difficulty with closure and strength of the lips - ✔✔drooping,
asymmetry, cleft lip, drooling
transverse facial muscles - ✔✔buccinator and risorious
buccinator and risorious - ✔✔contract to smile
buccinator - ✔✔main muscle of the cheek
-compress the lips and cheek against the teeth; draws corner of
mouth laterally
,-origin at the pteryomandibular raphe (also superior pharyngeal
constrictor)
risorious - ✔✔superficial to buccinator
-helps draw the mouth laterally
test lips - ✔✔pucker
smile
press lips on tongue depressor to test strength
angular facial muscles - ✔✔attach to orbicular iris at an angle
elevators:
-levator labii alaeque nasi
-levator labii superioris
-zygomatic minor
-zygomatic major
depressors: pulls down on orbicularis iris
-depresses labii inferioris
, vertical facial muscle - ✔✔mentalis
depressor anguli oris
levator anguli oris
tongue - ✔✔innervated by XII hypoglossal
-primary articulator (shapes oral cavity and changes resonance
characteristics of oral and associated cavities)
-valve-like to stop flow of air (stops) or acts as a noise-generator
while approximating teeth, alveolar ridge, and palate (fricative)
-divided into extrinsic (gross movements) and intrinsic (fine
movements) musculature
extrinsic muscles of the tongue - ✔✔move the tongue in the
general region desired (gross movements)
-genioglossus
-styloglossus
-palatoglossus
-hyoglossus
-chondroglossus
