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Infratemporal Fossa and Parotid

Superior mental spines are the attachment for what muscle? Inferior mental spines? Superior: Genioglossus. Inferior: Geniohyoid
TMJ description Upper and Lower synovial cavity separated by a articular disc. Weakest stabilizing element is joint capsule.
Name ligaments that stabilize the TMJ Lateral TM ligamnet, sphenomandibular and stylomandibular which guides the jaw in the process to rotate
Occlusal plane Where teeth meet one another
What vessels are found in the infratemporal fossa? Maxillary artery, middle meningeal and auriculotemporal nerve
Auricolutemporal nerve Sensory nerve to the fascia of partoid gland and to side of temple and around the ear
Petrotempanic fissure contents Fibers attach here and chroda tympani comes out
What part of the cavity of TMJ does translation take place? Rotation? Upper cavity: Translation. Lower Cavity: Rotation for elevation and depression
Masseter muscle action Closer of the mouth and will pull jaw up (Oblique and Vertical portion)
Temporalis fascia role Holds zygomatic arch in place and opposes forces of masseter muscle
Buccinator muscle role Responsible for keeping food on teeth as we chew and getting excess food out of lateral side of mouth. Motor: Facial nerve. Sensory: Buccal branch of Mandibular
Lateral Pterygoid muscle Attaches to lateral side of lateral plate. Superior head attached at capsule. Inferior head attached at neck. Protrudes mandible and keeps meniscus in place
Medial Pterygoid muscle Attaches to medial side of lateral plate. Fibers join up with masseter muscle
What nerves provide proprioception to TMJ? Masseteric and auriculotemporal nerve
Parotid gland Medial component invades infratemporal fossa. Sits in a bed. Sensory to fascia from auriculotemporal nerve.
Otic ganglion Post-synaptic parasympathetic that makes the parotid gland squirt
What nerve carries the pre-synaptic fibers to otic ganglion? Glossopharyngeal nerve
Lesser pertrosal nerve routes Can go through the foramen ovale, foramen spinosum or its own unnamed foramen. Finds otic ganglion, synapses then makes it squirt



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