Brain

Question 1

Describe the Cerebral Cortex

Answer 1

Divided into layers:

1. Layer = non-specific processing
2. Layer = primary processing of information
3. Layer = output to other cortical areas
4. Layer = thalamic input and relay to layer II
5. Layer = motor output
6. Layer = output to thalamus

Question 2

What is the yellow block?

Answer 2

Pia

Question 3

What is this?

Answer 3

Glia

Question 4

What is this?

Answer 4

Pyramidal neuron

Question 5

What is the ventricular system?

Answer 5

• contains the choroid plexus where the CSF is made and later goes into the subarachnoid space

Question 6

What kind of tissue lines the ventricular system?

Answer 6

simple columnar with ciliated ependymal cells

Question 7

What is this?

Answer 7

Choroid Plexus

Question 8

What does the Cerebrospinal fluid do?

Answer 8

• nourishes the CSN
• acts as a cushion

Question 9

What is the Cerebellums function?

Answer 9

• Coordinate the bodies movement
• To control/inhibit the activity of cerebral pyramidal cells

Question 10

What are folia?

Answer 10

elevations of cerebellar parenchyma

Question 11

What are Sulci?

Answer 11

Depressions separating folia

Question 12

What are the 3 layers of the cortex?

Answer 12

1. Molecular
2. Purkinje
3. Granular

Question 13

What does the Flocculonodular lobe of the cerebellum do?

Answer 13

Helps control balance in order to remain upright

Question 14

What does the anterior lobe and vermis of the cerebellum do?

Answer 14

Helps coordinate in order to walk

Question 15

What does the posterior lobe of the cerebellum do?

Answer 15

It helps with control of fine movements

Question 16

What are 3 signs of cerebellar disfunction?

Answer 16

1. Truncal ataxia = meduloblastoma in flocculonodular lobe
2. Gait ataxia = in the anterior lobe
3. intension tremor, dyskinesia = in the posterior lobe; occurs due to toxins

Question 17

Which is Sulcus and which is folia?

Answer 17

Question 18

What is this space?

Answer 18

Sulcus

Question 19

Which layer is purkinje, molecular, granular?

Answer 19

Question 20

What are the two types of neurons that play an important role in neruonal circuitry?

Answer 20

Purkenje and granule cells

Question 21

What are the 3 types of axons that play an important role in neuronal cicuitry?

Answer 21

1. Mossy Fibers = enter from outside
2. Climbing fibers = enter from outside
3. Parallel fibers = already inside since is axon of granule cells