Conscious proprioception of V5

Question 1

Cell bodies of the first order neuron for conscious proprioception are located where?

Answer 1

in the Mesencephalic nucleus of V

Question 2

The Mesencephalic nucleus of V is similar to what type of cells?

Answer 2

Pseudounipolar cells of ganglion,

—however they are positioned within the CNS

Question 3

A desecending component of the Mesencephalic nucleus of V is involved in what?

Answer 3

A myotatic reflex, the jaw-jerk reflex

Question 4

What is a myotatic reflex characterized by? (3)

Answer 4

1. ) Having only one synapse:
2. ) An afferent limb (incoming stretch information)
3. ) An efferent limb (lower motor neuron innervating muscle)

Question 5

Cell bodies Secondary order neurons of Concious proprioception of the face are located where?

Answer 5

In the Reticular Formation

Question 6

Axons from 2nd order neurons may be crossed or uncrossed and travel where?

Answer 6

Ascend in either the Ventral Trigemino-thalamic Tract (VTT) or Dorsal Trigeino-thalmic tract (DTT)

Question 7

after traveling in the VTT or DTT where do 2nd order neurons synapse?

Answer 7

In the Ventral Posteromedial thalmic nucleus (VPM)

Question 8

Cell bodies of 3rd order neurons are located where?

Answer 8

Ventral posteromedial (VPM) thalmic nucleus

Question 9

Axons of 3rd order neurons ascend with other axons of the sensory modalities of the face through what?

Answer 9

The posterior limb of the internal capsule to terminate in th postcentral gyrus