Muscles Of Mastication, Infratemporal Fossa - Stephens 3/30 Flashcards
What passes between the sphenomandibular ligament and the neck of the mandible?
Maxillary artery and vein
Auriculotemporal nerve
What ligament may become calcified and obstruct the needle in a maxillary nerve block?
Pterygospinous ligament
What changes the axis rotation of the mandible?
Stylomandibular ligament
What muscles do you palpate for motor component for examination of the Trigeminal nerve?
Temporalis m.
Masseter m.
What are the muscles of mastication?
Temporalis, masseter, medial pterygoid, lateral pterygoid
What passes between the 2 heads of the lateral pterygoid?
Maxillary artery and buccal nerve
What courses between the medial and lateral pterygoids?
Inferior alveolar and lingual nerves
What is the stimulus for the jaw-jerk/masseteric reflex?
What is the result?
Rapid depression of the chin
Reflex clinching of the teeth
What are the receptors for the jaw-jerk reflex?
What happens after they are activated?
Then goes where?
Stretching of neuromuscular spindles in Masseter muscle
Afferent fibers course in the Masseteric nerve
Mesencephalic nucleus of CN 5
After the afferent fibers have reached the sensory nucleus of CN 5, what happens next in the jaw-jerk reflex?
From there what happens?
What is the effector?
Final response?
Motor nucleus of CN 5
Efferents fibers course in the Masseteric nerve
Neuromuscular endplates in the masseter muscle
Contraction of masseter muscle
What muscles are responsible for normal opening of the mouth?
Gravity
Lateral pterygoid
What muscles are responsible for wide opening of the mouth?
Lateral pterygoid
Suprahyoid muscles
What muscles are responsible for normal closing of the mouth?
Temporalis
Masseter
Medial Pterygoid
TMM
The TMJ has 2 synovial cavities with associated joints, what are they and what kind are they?
Higher - gliding joint
Lower - hinge joint
What is the articular disk of TMJ attached to?
Sphenomeniscus muscle and strong lateral (collateral) ligament
The superior joint of TMJ is between what?
Inferior joint?
Mandibular fossa and articular tubercle
Articular disk and mandibular condyle
Newborn mental angle is what?
Adult?
Senior patient?
4 yo child?
175
110-120
140
140
Fractures of the neck of the mandible compromise what structures?
Maxillary a and v
Auriculotemporal nerve
Fractures of the ramus of the mandible may damage what?
Lingual n.
Inferior alveolar n.
Fractures of the body of the mandible may compress what?
Inferior alveolar nerve and vessels
The auriculotemporal, long buccal, lingual, chord and tympani, and inferior alveolar nerves come out of what hole?
Foramen ovale
The mylohyoid nerve supplies what muscles?
Mylohyoid
Anterior digastric m.
What nerve supplies innervation to the taste buds of the anterior 2/3 of the tongue?
Chorda tympani
What does the accessory meningeal artery supply?
Trigeminal ganglion
