tmj and mandibular nerve Flashcards
ARTICULAR surfaces upper and lower of tmj
upper- articular tubercle of
- anterior part of mandibular fossa
-posterior non articular part of tympanic plate
lower- head of the mandible
ligaments of tmj
fibrous capsule, lateral temporomandibular ligament, sphenomandibular and stylomandibular
fibrous capsule
attached upwards to articular tubercle and below to the neck of the mandibile. it is lose above the intraacrticular disc and tight below
lateral ligament
strengthens and tightens the lateral part of capsular ligament
attached upwards to articular tubrcle and blow to the posterolateral part of neck of the mandible
sphenomandibular ligament
accessory ligament
attached to the spine of sphenoid and to the lingula of mandibular foramen
sphenomandibular ligament is related laterally and medially to
laterally- lateral pterygoid muscle
maxillary artery and auricotemporal nerve
medially- chorda tympani
wall of pharynx
stylomandibular ligament
represents the thickened part of deep cervical fascia which seperates the parotid gland and submanibular gland
atatched above to lateral part of styloid process and below to poasterior border of the ramus of the mandible
articular disc is composed of
anterior extensio, anterior thick band, intermediate zone, posterior thick band and bilaminar disk containing venous plexus
relations of tmj
lateral
skin and fascia
parotid gland
temporal branches of facial nerve
relations of tmj
medial
MS CAT middle meningeal artery styloid process chorda tympani aurcotemporal nerve tympanic plate separates the joint from the internal carotid artery
relations of tmj
anterior
lateral pterygoid muscle
masseteric nerve and vessels
relations of tmj
posterior
superficial temporal
partodid gland seperates the joint from external acoustic meautus
chorda tympani
relations of tmj
superior
middle cranial fossa
middle menningeal vessels
relations of tmj
inferior
maxillary artery
blood supply of tmj and nerve supply
branches of maxillary artery (deep auricular) and branches of superficial temporal
auricotemporal nerve and masseteric nerve
Depression is brought by
lateral pterygoid with gemiohyoid mylohyoid and diagastric
elevation is Brought by
masseter, anterior vertical, middle oblique fibers of temporalis and medial pterygoid on both sides
Protrusion is brought by
medial and lateral pterygoid and superficial oblique fibers of masseter
REtraction is brought by
posterior horizontal of temporalis and deep vertical of masseter
Mandibular nerve what is?
Branch of trigeminal nerve n nerve of First brachial arch
Mandibular nerve course
begins in the middle cranial fossa.
2 roots sensory and motor
Leaves through formsnen ovale ans divides into small anterior trunk and large posterior trunk
Branches from main trunk of mandibular nedve
nerve to medial pterygoid
Meningeal branch
Branches from anterior trunk of mandibular nerve
Sensory root to buccal
Motor root to masseteric, deep temporal and lateral pterygoid
Branches from posteriori truck of mandibular nerve
Auricotemporal
Inferior alveolar
Lingual
Meningeal branch
Enters the skull through foramen spinosam
Supplies dura matter of middle cranial fossa
Nerve to medial pterygoid
supplied medial pterygoid and gives motor root to tensor tympani, tensor veli palatini
Buccal nerve
only sensory root . Supplies skin of cheek, mucous membrane related to buccinator and labial aspect of gums of molar and premolar teeth
Masseteric
goes through mandibular notch supplied masseter and tmj
Deep temporal
2 ant and post and supply deep surface of temporalis
Erve to lateral pterygoid
supplied deep surface of the muscle
Auricotemporal nerve
auricle part supplies skin of tragus upper part of pinna external acoustic meatus and tympanic membrane
Temporal part supplies the skin of temp,e
Also supplies parotid gland and tmj
lingual nerve
sensory to anterior 2/3 of tongue and floor of the mouth and chorda tympani is secretomotor supply to submandibular and sublingual glands and gustatory to ant2/3rd of the tongue supplied by lingual nerve
Inferior alveolar nerve
Larger terminal branch of mandibular never enters the mandibular foramen through mandibular canal
Divisions of IA nerve
mylohyoid goes through mylohyoid grove and supplies the mylohyoid mucked and sent belly of diagastric
Branch to lower gum and teeth
Mental branch through mental foramen that supplies skin of skin and mucous membrane of lower lip. Incisive branch that supplies the labial aspect of gums of canines and incisors
terminal branch of mandibular nerve
inferior alveolar nerve and buccal nerve
cancer of the tongue is felt by (reffered pain)
auricotemporal nerve
as lingual and auricotemporal nerve both are a branch of mandibular nerve
during wisdom tooth what nerve should be taken care of
lingual nerve
paralysis of muscles of mastication, parasthesia of mandibile, tongue temporal region is caused by
lesion in foramen ovale
loss of jaw jerk reflex is caused by
mandibular nerve
extracting mandibular teeth u give anesthesia t what nerve
inferior alveolar nerve before it enters the mandibular canal
fracture to mandible can cause damage to what nerve
inferior alveolar nerve
injury to spine of sphenoid what 2 nerves are affected
chorda tympani and auricotemporal nerve
