Week 10: Cerebrum

Question 1

According to Brodmann’s six-layered cortical structure, layer 1 is known as:

Select one:

a. external granular layer
b. multiform layer
c. molecular layer
d. external pyramidal layer

Answer 1

c. molecular layer

Question 2

Commissural fibres:
Select one:

a. are confined to one hemisphere
b. connect the cortex with subcortical areas
c. connect the two hemispheres
d. are long fibres that connect different lobes of the same hemisphere

Answer 2

c. connect the two hemispheres

Question 3

The neocortex:
Select one:

a. contains the hippocampal formation
b. is a six layered structure
c. is involved in olfactory processing
d. is easily defined in humans compared to other mammals

Answer 3

b. is a six layered structure

Question 4

The primary somatic sensation area is found in which of Brodmann’s areas?

Select one:

a. 3,2,1
b. 5,7
c. 17,18
d. 46,9

Answer 4

a. 3,2,1

Question 5

List the three types of cerebral fibre tracts.

Answer 5

Association fibres

Commissural fibres

Projection fibres

Question 6

Areas 5 & 7of Brodmann’s map are the:

a. primary somatic sensation area
b. Primary visual area
c. Visual association cortex
d. Somesthetic association cortex

Answer 6

d. Somesthetic association cortex

Question 7

List the major principle cells and interneurons of the

cerebral cortex.

Answer 7

Principle cells
• Pyramidal cells
• Fusiform cells

Interneurons
• Stellate cells
• Basket cells
• Retzius-Cajal cells
• Cells of Martinotti

Question 8

List the three types of cortex in mammals

Answer 8

• Archicortex (Hippocampal formation)
• Paleocortex (Olfactory cortex)
• Neocortex

Question 9

What separates the parietal and frontal lobe?

a. Central sulcus
b. Parieto-occipital sulcus
c. Preoccipital notch
d. Calcarine sulcus
e. Lateral fissure

Answer 9

a. Central sulcus

Question 10

Atypical principle cells with irregularly elliptical cells
bodies are called:

a. Pyramidal cells
b. Fusiform cells
c. Basket cells
d. Retzius-Cajal cells

Answer 10

b. Fusiform cells

Question 11

Which of the following is CORRECT regarding association fibres?

a. Short fibres (arcuate) connect adjacent area while long fibres connect different lobes
b. Afferents are called Corticopetal
c. Includes the Corpus callosum and anterior cingulate
d. Forms connection between the cortex and subcortical areas

Answer 11

a. Short fibres (arcuate) connect adjacent area while long fibres connect different lobes

Question 12

Which of the following is NOT true regarding the Somesthetic association cortex?

a. It is located in the superior parietal lobule (lateral) precuneus (medial)
b. it receives afferent fibres from primary somesthetic area and lateral posterior thalamus and pulvinar
c. It is Areas 18 & 19 of Brodmann’s map
d. Allows for example to be able to recognise the characteristics of an object held in the hand without visual aid

Answer 12

c. It is Areas 18 & 19 of Brodmann’s map

Correction:
Areas 5 & 7of Brodmann’s map

Question 13

Stellate cells
Select one:

a. Are excitatory
b. Found in superficial layers
c. Have lateral branching axons embracing pyramidal cells
d. Have axons that project toward the plial layer

Answer 13

a. Are excitatory

Question 14

List the 6 cortical layers.

Answer 14

1 Molecular layer
2 External granular layer
3 External pyramidal layer
4 Internal granular layer
5 Internal pyramidal layer
6 Multiform layer

Question 15

Projection fibres
Select one:

a. are confined to one hemisphere
b. connect the cortex with subcortical areas
c. connect the two hemispheres
d. are long fibres that connect different lobes of the same hemisphere

Answer 15

b. connect the cortex with subcortical areas