Lecture 7: Cortical Mapping

Question 1

Organization of the cerebral cortex:

Answer 1

1. Superficial grey matter (neurons)
2. White matter tracts (axons)
3. Deep nuclei (neurons)

Question 2

Cerebral cortex has ___ cellular layers

Answer 2

6

Question 3

Deep cortical structures and cerebellum have ____ cellular layers

Answer 3

3

Question 4

(Mostly) motor lobes of the brain are the:

Answer 4

Frontal lobe

Question 5

(Mostly) sensory lobes of the brain are the:

Answer 5

Parietal lobe, occipital lobe, temporal lobe

Question 6

Gustatory cortex:

Answer 6

Taste chemoreception and food preference.

Question 7

Insular cortex:

Answer 7

Roles in balance, and emotional context to sensation

Question 8

Damage to right side of brain:

Answer 8

Lack of emotional component to speech
Right=creative

Question 9

Damage to left side of brain:

Answer 9

Aphasia
Left= logical

Question 10

Three types of white matter fibers and where they project:

Answer 10

1. Commissural fibers
   - Between hemispheres
2. Association fibres
   - within hemispheres, between lobes
3. Projection fibres
   - To different parts of CNS

Question 11

Roles of basal nuclei:

Answer 11

• Imitate, coordinate, and stops motor movement
• Eliminates unnecessary movements
• Skills memory

Question 12

Nuclei of the basal nuclei:

Answer 12

Caudate (head), lentiform nucleus (putamen and globus pallidus), and caudate (tail)

Question 13

Roles of thalamus:

Answer 13

• Relay sensation and motor nuclei to the cerebral cortex

Question 14

Huntington’s chorea:

Answer 14

Neurodegeneration in striatum = increased movements

Question 15

Loss of basal nuclei results in:

Answer 15

Huntington’s chorea