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SU2017 Physio Exam 1 > Lecture 3- trigeminal Travers > Flashcards

Lecture 3- trigeminal Travers Flashcards

1
Q

the trigeminal nerve has 3 divisions:
ophthalmic which is… only
maxillary which is … only
mandibular which is…

A

sensory
sensory
sensory and motor

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2
Q

infraorbital is a branch of which of the 3 divisions of the trigeminal nerve?

A

maxillary

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3
Q 
what type of receptors does the infraorbital nerve NOT have?
RA1
SA1
RA2
SA2
A

RA2 (no pacinian corpuscles!)

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4
Q

lingual is a branch of the

A

mandibular branch of trigeminal

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5
Q

what kind of ending predominate the tongue?

A

unencapsulated coiled endings- krause end bulbs

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6
Q

what are Krause end bulbs and what are they similar to?

A

unencapsulated nerve endings in the tongue and they are similar to meissner corpuscle (RA1)

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7
Q

does the tongue have rapid or slow adapting mechanoreceptors?

A

BOTH despite having only one kind of ending

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8
Q

The tmj is primarily innervated by…. which is a branch of the… of the trigeminal nerve

A

auriculotemporal

mandibular

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9
Q

the tmj is innervated by…. , …. and…

A

auriculotemporal
masseter
posterior deep temporal

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10
Q

the tmj has mostly …. fibers

A

C

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11
Q

The PDL is innervated by… and…

A

superior alveolar of the maxillary

inferior alveolar of the mandibular

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12
Q

2 types of receptors in the PDL

A

simple and complex ruffini

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13
Q

innervation from the trigeminal ganglia to the PDL are mostly located at the …. of the tooth while innervation from the mesencephalic nucleus to the PDL are mostly located at the…. of the tooth

A

middle

apex

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14
Q

which nerve fibers are temperature sensitive

A

A delta and Cfibers

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15
Q

at what temperature does warm sensation turn to painful

A

43 degrees celsius

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16
Q

what part of the brainstem is associated with temperature

A

interpolaris of spinal trigeminal nucleus (in medulla)

17
Q

gasserian ganglia and semilunar are other names for

A

trigeminal ganglion

18
Q

Which is biggest and fastest?
A beta
A delta
C fiber

A

A beta

19
Q

Which has the highest threshold?
A beta
A delta
C fiber

A

C- fiber

then A delta followed by A beta

20
Q

RAII and SAII are what size and have what kind of borders?

A

large, obscure borders

21
Q

RAI and SAI are what size and have what kind of borders?

A

small, sharp borders

22
Q

Meissner corpuscles are examples of what class of mechanoreceptors?

A

RAI

23
Q

Meissner corpuscles are superficial or deep?
their function is….
are they encapsulated?

A

superficial
spatial discrimination
yes

24
Q

Pacinian corpuscles are an example of what class of mechanoreceptors?

A

RAII

25
Q

Pacinian corpuscles are superficial or deep?
their function is…
are they encapsulated?

A

deep
vibration
yes

26
Q

Merkel discs are an example of what class of mechanoreceptors?

A

SAI

27
Q

Merkel discs are superficial or deep?
their function is….
are they encapsulated?

A

superficial
pressure
no

28
Q

Ruffini endings are an example of what class of mechanoreceptors?

A

SAII

29
Q

Ruffini endings are superficial or deep?
their function is….
are they encapsulated?

A

deep
skin stretch
no

30
Q

3 mechanisms of mechanotransduction

A
  1. ENaC (epithelial Na channels)
  2. TRP channels (transient receptor potentials)
  3. Piezo1 and Piezo2: 36 transmembrane domains
31
Q

Semmes-weinstein monofilaments are also called… and they measure…. and are calibrated in…

A

von frey hairs
touch discrimination
mg

32
Q

the…. and… nerve can sometimes be damaged by 3rd molar extraction

A

lingual and mental nerve (branch of IAN)

33
Q

is microneurography possible in the TMJ?

A

no

34
Q

temperature transduction is mediated by…

A

transient receptor potentials

SU2017 Physio Exam 1 (8 decks)

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