4-3 articulatory muscles Flashcards
exinternal head of massester
origin: anterior portion of zygomatic arch
insertion: mandible
CNV
elevates jaw
internal head of masseter
origin: posterior & medial portion of zygomatic arch
insertion: mandible
CNV
elevates mandible
temporalis
origin: temporal fossa
insertion: coronoid process of mandible
CNV
elevates mandible
deep head of medial pterygoid
larger
origin: pterygoid fossa of sphenoid bone
insertion: inside of the angle of the mandible
CNV
elevates mandible
superficial head of medial pterygoid
smaller
origin: palatine bone & maxillae
insertion: inside of the angle of the mandible
CNV
elevates mandible
anterior belly of digastric muscle
origin: lower border of mandible
insertion: intermediate tendon
CNV
depresses mandible
posterior belly of digastric muscle
origin: mastoid process of temporal bone
insertion: intermediate tenson
CNVII
depresses mandible
mylohyoid
origin: lower inner border of mandible
insertion: hyoid
CNV
depresses the mandible
geniohyoid
origin: mental spines of mandible
insertion: hyoid bone
CNXII
depresses mandible
superior head of lateral pterygoid
origin: greater wings of sphenoid bone
insertion: condylar process of mandible (temporomandibular joint)
CNV
protrudes (& depresses) mandible
inferior head of lateral pterygoid
origin: lateral pterygoid plate of sphenoid bone
insertion: condylar process of mandible (temporomandibular joint)
CNV
protrudes (& depresses) mandible
genioglossus
origin: internal surface of mandible
insertion: hyoid, mostly tongue
CNXII
contraction produces a range of tongue movements
styloglossus
origin: styloid process of temporal bone
insertion: sides of the tongue
CNVII
draws sides of tongue up & back
hyoglossus
origin: hyoid bone
insertion: posterior sides of tongue
CNXII
retracts & depresses the tongue
elevates hyoid bone if tongue is fixed
palatoglossus
origin: posterior surface of hard palate
insertion: sides of tongue
CNX
raise & retract sides & back of tongue
lowers soft palate if tongue is fixed
