Module 1 - Part 3

Question 1

How does Broadmann’s Map organize the brain? How many areas are there?

Answer 1

It organizes brain structures according to cytoarchitectonics
- there are over 50 different areas

Question 2

What is BA 17?

Answer 2

Primary visual cortex

Question 3

What is BA 41?

Answer 3

Primary auditory cortex

Question 4

What are BA 1, 2, and 3?

Answer 4

Primary somatosensory cortex

Question 5

What are BA 44 an 45?

Answer 5

Broca’s Area

Question 6

Name the 3 layers of the meninges

Answer 6

1. Dura mater (hard mother)
2. Pia mater (Soft mother)
3. Arachnoid membrane (connects hard and soft)

Question 7

Why are the regions of the brain called different things? Ex: visual region is called V1, primary visual cortex, BA 17, etc….

Answer 7

There are different names for the same structure due to the different disciplines that study the brain

Question 8

What are the four tracts that run through the cortex?

Answer 8

1. intra-gyrus (within a gyrus)
2. intra-hemisphere (within a hemisphere)
3. inter-hemisphere (between hemispheres)
4. subcortical and thalamic (from cortex to thalamus)

Question 9

What effect does moving through a sulcus have?

Answer 9

It changes the functional responsibility of the area

Question 10

What 4 defence mechanisms does the CNS have?

Answer 10

1. bone (but when swelling occurs in the brain, this could prove fatal)
2. the meninges (but an infection of the meninges could arise)
3. CSF circulating in the ventricles and central aqueduct (but hydrocephalus, or a blockage of CSF fluid, can prove fatal)
4. blood-brain barrier (this is so effective at keeping things out that even antibiotic treatments will not be able to pass)

Question 11

Name the ventricles.

Answer 11

1. lateral ventricle
2. third ventricle
3. fourth ventricle
   - all lead to the central acqueduct

Question 12

Describe the blood-brain barrier?

Answer 12

It is the barrier between the arterial supply and the brain