Muscles of Mastication Flashcards
Main masticatory muscle
masseter
A: causes elevation and protrusion of mandible
Masseter
A: assists other masticatory muscles to move the mandible laterally
masseter
CN: Masseter
Mandibular branch of trigeminal nerve CN V3
A: elevates and retrudes the mandible
Temporalis
A: assists in lateral movements of mandible
Temporalis
CN: Temporalis
mandibular branch of the trigeminal nerve (CN V3)
A: elevate (close) the jaw and protrude the jaw (move it forward)
Medial pterygoid
CN: Medial pterygoid
mandibular branch of trigeminal nerve (CN V3)
A: causes protrusion and depression of the jaw
Lateral Pterygoid
CN: Lateral pterygoid
mandibular branch of the trigeminal nerve (CN V3)
Floor of the mouth is made up with which muscles?
suprahyoid muscles, digastric muscles,
Mylohyoid
Geniohyoid
Name the accessory muscles of mastication
Anterior and posterior belly of digastric
Buccinator
Mylohyoid
Geniohyoid
The anterior and posterior gastric belly are separated by
intermediate tendon
A: depresses mandible
Anterior belly of digastric muscle
Posterior belly of digastric Mylohyoid
Geniohyoid
CN: Anterior belly of the digastric
mandibular branch of CN V
CN: Mylohyoid
mandibular branch of trigeminal nerve
CN: Geniohyoid
CN 1 (C1?)
Only articulation between the skull and mandible
TMJ
The skull and mandible articulate at the ____ and ____
mandibular condyle, zygomatic part of the temporal bone
TMJ receives ___ (VE,VA,GA,GE,SA) from _____
GA, mandibular branch of the trigeminal nerve
What is the most common source of facial pain after dental pain?
TMJ disorder
TMJ disorder usually affects what demographic?
20-40 yo
What branch is the pain carried through in TMJ disorder?
auriculotemporal nerve (branch of V3)
Symptoms of TMJ disorder include:
pain in jaw and around ear
difficulty chewing
locking of joint
headache
How do you treat TMJ pain?
pain meds
botox
bite guards
surgery
