Trigeminal

Question 1

Merkel and Ruffini are

Answer 1

slow adapting

Question 2

Pancinian and Meisner are

Answer 2

rapidly adapting

Question 3

What are our warming receptors in face

Answer 3

C fibers

Question 4

What are the cooling receptors in face

Answer 4

A-delta

Question 5

Where are the cell bodies of face located (touch/proprio)

Answer 5

trigeminal ganglion

Question 6

What are the peripheral processes of the TG (touch/proprio)?

Answer 6

CN V = trigeminal nerve

Question 7

Where does the trigeminal N head from the trigeminal ganglion (touch/proprio)

Answer 7

enter brainsteom at ventrolateral pons

Question 8

Where are the second order neurons for Trigem system located (touch/proprio)

Answer 8

Main sensory nucleus or Chief sensory nucleus V

Question 9

What is the ascending pathway from second order neurons of Trigem after leaves Cheif sensory nucleus (touch/proprio)

Answer 9

Medial lemniscus or Trigeminal Lemniscus

Question 10

Destination of the ascending pathway for trigeminal system (touch/proprio)

Answer 10

VPM

Question 11

Primary afferent cell body location for pain/temp of face

Answer 11

Trigem ganglion

Question 12

Central processes of Trigem system for pain and temp

Answer 12

Spinal tract

Question 13

Second order neurons for face (pain/temp)

Answer 13

Spinal nucleus (caudal nucleus)

Question 14

Ascending pathway for pain/temp on face

Answer 14

Trigeminothalmanic tract

Question 15

Destination of the ascending pathwaay for pain/temp afferents of face

Answer 15

VPM and others

Question 16

Both pain and fine touch from face end up in

Answer 16

VPM

Question 17

Crude touch from face takes a different path by:

Answer 17

entering pons and descending down spinothalmic tract w/out synapsing

Question 18

Where do crude touch for face synapse?

Answer 18

on the spinal nuclues after descending from pons and CROSSES OVER

Question 19

Where do crude touch fibers from face cross over?

Answer 19

in caudal medulla (other fine touch do so in pons)

Question 20

What is special about oral cavity sensory info

Answer 20

follows same general pathway by entering Trigem ganglion–> principle sensory nucleus of V in pons BUT some cross over and acsend up Dorsal trigeminal tract while others ascend up dorsal trigem on same side

Question 21

Oral cavity representation is:

Answer 21

bilateral

Question 22

Somatotopy of VPM

Answer 22

Tongue = medial
oral cavity
Face it lateral

Question 23

Fine touch uses this for 2nd order neurons:

Pain uses this path for 2nd order neurons:

Answer 23

Trigeminal lemniscus

Trigeminothalmic

Question 24

Fine touch crosses contralateral at:

Pain crosses contralateral at:

Answer 24

level of pons

level of caudal medulla after descending

Question 25

Touch Second order neurons are located : | Pain second order neurons located:

Answer 25

Chief sensory nucleus in pons | Spinal nuclues in caudal medulla

Question 26

Both touch and pain uses this for housing first order neuron cell bodies

Answer 26

trigeminal ganglion

Question 27

Fine touch uses this for pirmary afferents (central processes) Pain uses this for primary afferents (central Processes)

Answer 27

entering trigeminal fibers | spinal tract

Question 28

Recurrent episodes for seconds to minutes a. Neuralgia = pain along a course of nerve b. Recurrent espisode of excruciating pain lasting seconds/mins c. Occurs in any or many: ear/eye/lips/nose/scalp/forehead/teeth/jaw d. regions of V2/V3 territory e. Provoked by chewing, shaving, brushing teeth, touching trigger pts Unknown cause but it is NEUROPATHIC pain

Answer 28

Trigeminal neuralgia or ‘tic douloureux’

Question 29

TX for tic douloreux

Answer 29

TX: carbamazepin sometimes antidepressents

Question 30

Tx for TMJ

Answer 30

NSAIDS or mouthguard

Question 31

Fibers carrying fine touch from body and face enter;

Answer 31

medial lemniscus trigeminal lemniscus AT different levels

Question 32

Body fibers for medial lemniscus enter at level of | fine touch

Answer 32

caudal medulla

Question 33

Face fibres for trigeminal lemniscus enter at level of | fine touch

Answer 33

pons

Question 34

When you think leminscus think:

Answer 34

fine touch

Question 35

Above this level medial lemniscus and trigeminial lemniscus run together

Answer 35

above pons

Question 36

Fibers carrying pain/temp from body enter as | from face enter as

Answer 36

``` anterolateral tracts (body) trigeminothalmic tracts (face) ```

Question 37

Body fibers for pain enter where

Answer 37

all along spinal cord

Question 38

face pain fibers enter in

Answer 38

from cervical cord to caudal medulla (where spinal nucleus V located)

Question 39

At what level to anterolateral and trigeminothalmic tracts run together

Answer 39

rostral level