19.8

Question 1

There is a topographical map of the dorsal/posterior columns in the spinal cord - the lower/distal the information from the spinal cord, the more ___ in dorsal columns.

Answer 1

Medial!!!

Question 2

There are two divisions of the ventral thalamus: ___ and ___

Answer 2

Medial and lateral.

Question 3

All information from body except face is sent via the lemniscus to the ___ part of ventral thalamus.

Answer 3

Lateral

Question 4

Information from face via trigeminal nerve goes to the ___ part of ventral thalamus.

Answer 4

Medial

Question 5

The postcentral gyrus is the ___ ___ cortex or ___1.

Answer 5

Primary somatosensory cortex

S1

Question 6

The postcentral gyrus extends from the longitudinal fissure medially to the ___ fissure/___ fissure laterally.

Answer 6

Lateral or Sylvian fissure.

Question 7

There are _ parts of S1, and so there are _ maps of the ___ side of the body in the postcentral gyrus of one side.

Answer 7

4 parts of S1
4 maps of the contralateral side of the body.
-> Somatotopic order!

Question 8

Most information from the ventral posterior thalamus goes to area ___ of S1.

Answer 8

3b

Question 9

Parcellation

Answer 9

Separate areas of input in brain from specific organs e.g. ocular dominance columns.

Question 10

Repetitive behavioural tasks cause functional expansion of the cortical representations of body parts e.g. digits. This is called ___

Answer 10

Plasticity