Cerebrum and Cerebellum

Question 1

What are the 3 layers in early brain development? Forebrain?

Answer 1

ectoderm
mesoderm
endoderm
- neural plate –> neural tube –> forebrain

Question 2

4 Layers of Meninges?

Answer 2

dura matter – connect to skull
arachnoid – loose CT
sub-arachnoid – CSF + blood vessel
pia matter – line brain and enters indents

Question 3

Blood brain barrier made of?

Answer 3

endothelial cells
tight junctions (impermeability)
astrocytes (maintain integrity)

Question 4

Gray vs White Matter?

Answer 4

Gray
- neuropil (neurons, dendrites, axons)
- blood vessels

White
- axon, glia, MYELIN
- fibers>cell bodies

Question 5

Components in cerebrum?

Answer 5

sulcus (sulci) = indent
gyrus (gyri) = folds

Question 6

Components in cerebellum?

Answer 6

folium (folia) = parallel foldings

Question 7

Hippocampus location and contains?

Answer 7

adjacent to cortex
dentate gyrus – densely packed cell bodies

Question 8

Organization of cortex?

Answer 8

molecular layer (no cell bodies)
external granular layer
external pyramidal cell layer
inner granular layer (major input layer)
inner pyramidal cell layer (big output neurons)
multiform cell layer

Question 9

3 layers of cerebellum?

Answer 9

molecular layer – mostly dendrites
granular layer – lots of neurons
Purkinje layer (contain Purkinje cells)