robbypowell's version from 2015-06-22 22:23


Question Answer
Which group of teeth are known for "testing" food? (determining the toughness and how much chewing force is necessary)Anterior teeth
_____ signals from the teeth allow for the evaluation of food to be chewedPROPRIOCEPTIVE
Where are the functional sensory inputs of TEETH collected?in the PDL & pulp (proprioception, not pain, is what is being referred to here)
What 5 areas house receptors that contribute to the proprioceptive input of mastication?PDL, Pulp, Gingiva, Tongue & Muscles of Mastication
Chewing is usually a ___-lateral actionUNILATERAL (one working side & one contralateral balancing side)
What Cranial Nerve(s) carry mechano-reception from the process of Mastication?Trigeminal (V2 & V3)
T/F: Chewing cycles for an individual chewing the same food are almost identicalFalse, (cycles, even with same person chewing same food are HIGHLY VARIABLE)
What reflex prevents dental trauma when a hard object suddenly gives way under bite force?JAW OPENING REFLEX
What normally determines the AMPLITUDE of mastication cycles?the CONSISTENCY of food
T/F: While mastication can be consciously controlled (stop, start) the process is basically automatic past initiation.True (Masticatory center in Reticular formation of Pons)
What are the Articular surfaces of the TMJ and what coats them?Glenoid Fossa & Condyle head; Non-cartilagenous Fibrous Tissue
How many articulating surface are there of the TMJ?NINE (4 on each side + teeth)
What portion of the TMJ disc is located between the Condyle and the Glenoid Fossa when in resting position?Posterior Thick zone
What muscle of mastication causes the "maximum opening" of the TMJ?Lat. Pterygoid
Protrusion is accomplished by the contraction of what 3 muscles?Temporalis (anterior head), Medial Pterygoid, & Lateral Pterygoid
What muscles contract for a right-working excursive movement?Left Medial & Lateral Pterygoid, Right Masseter & Temporalis
Which head of which muscles is Inserted into the articular disc?Superior Head of Lateral Pterygoid
T/F: Brain dead patients can still chew without involvement from the cerebral cortex.True (brain stem controlled, Masticatory center of Pons)