Infratemporal Fossa Flashcards
What are the four muscles of mastication?
masseter, temporalis, lateral/medial pterygoid
what is the action of muscles of mastication?
movement of the mandible during mastication and speech
name the sole depressor of the mandible
lateral pterygoid
what specific nerve supplies motor innervation to the muscles of mastication?
mandibular division of trigeminal nerve (V3)
which of the muscles of mastication attach to the lateral pterygoid process?
lateral/medial pterygoid
which of the muscles of mastication inserts into the TMJ?
lateral pterygoid
which of the muscles of mastication attaches to the coronoid process?
temporalis
which of the muscles of mastication attaches to the angle of the mandible?
masseter
from what vessel does the maxillary artery arise?
external carotid artery
what are 3 clinically important branches of the maxillary artery and what does each supply?
middle meningeal–dura of cranium, inferior alveolar–teeth of lower jaw and posterior superior alveolar–teeth of upper jaw and maxillary sinus
what is the continuation of the maxillary artery called after it passes thru the pterygomaxillary fissure? what does it supply?
sphenopalatine–nasal cavity
what are the main branches of V3?
auriculotemporal, lingual, inferior alveolar and buccal NERVES
what is the general function of each of the branches of V3?
auricotemporal–sensory to the skin in front of the ear, buccal–sensory to the kucosa of the inside of the cheek, lingual–general sensation to the anterior 2/3 of tongue, inferior alveolar–sensory to the lower teeth
which of the sensory branches of V3 gives off a small motor root to the region under the mandible? what is the nerve and what does it supply?
inferior alveolar–nerve to mylohyoid–MOTOR to the mylohyoid and the anterior belly of the digastric
how does special sense of taste reach the tongue?
fibers for special sensation of taste leave the FACIAL NERVE as it travels within the temporal bone in a branch called the chorda tympani. chorda tympani passes thru the middle ear cavity and enters the back side of the LINGUAL NERVE of V3 within the infratemporal fossa. taste fibers for the anterior 2/3 of the tongue are distributed by the lingual nerve.
