1: Basic Topography Of The Nervous System

Question 1

What sulcus separates the frontal from the parietal lobes?

Answer 1

Central sulcus

Question 2

Where is the primary motor cortex located?

Answer 2

Precentral gyrus

Question 3

Where is the sensory cortex located?

Answer 3

Post central gyrus

Question 4

What does the lateral sulcus separate?

Answer 4

Frontal and parietal lobes from the temporal

Question 5

What are the layers of meninges?

Answer 5

Dura (double layered)
Arachnoid
Pia

Question 6

What is the innervation and the arterial supply of the dura mater?

Answer 6

CN V

MMA

Question 7

Which meningeal layer is avascular?

Answer 7

Arachnoid

Question 8

What is the function of the ventricles of the brain?

Answer 8

Production of CSF

Question 9

Which ventricle/s contain the most choroid plexus?

Answer 9

Lateral ventricles

Question 10

What is the name of the channel that drains CSF between the 3rd and 4th ventricle?

Answer 10

Cerebral aqueduct

Question 11

What is the falx cerebri?

Answer 11

A fold of the meningeal layer of the dura mater that separates the right and left cerebral hemispheres

Question 12

What is the thin sheet that separates the cerebellum from the cerebrum?

Answer 12

Tentorium cerebelli

Question 13

What is the corpus callosum?

Answer 13

White mater structure connecting the right and left hemispheres

Question 14

What artery do the vertebral armies form when they converge?

Answer 14

The basilar artery

Question 15

The middle cerebral arteries arise from which artery?

Answer 15

The internal carotids

Question 16

Which arteries do the vertebral arteries arise from?

Answer 16

Subclavian arteries

Question 17

What are the 3 main constituents of the Circle of Willis?

Answer 17

Anterior cerebral
Middle cerebral (from ICAs)
Posterior cerebral (from divergence of basilar)

Question 18

Which artery supplies the most medial portion of the cerebrum?

Answer 18

Anterior cerebral arteries

Question 19

Which part of the cerebrum do the middle cerebral arteries mostly supply?

Answer 19

Lateral part

Question 20

Which region of the body is represented most laterally in the motor homonculus?

Answer 20

Face

Question 21

CSF circulates in which space in the brain?

Answer 21

Subarachnoid space

Question 22

Which lobe is the hippocampus located in?

Answer 22

Temporal lobe

Question 23

Which type of spina bifida is associated with no obvious physical deformity and just a bony vertebra arch defect?

Answer 23

Spina bifida occulta

Question 24

How does spina bifida meningocele differ to myelomeningocele?

Answer 24

In meningocele there is a protrusion of the skin due to a protrusion of the dura and arachnoid mater forming a cyst filled with CSF, but there is no spinal cord present in the sac
There is spinal cord present in the sac in a myelomeningocele

Question 25

What is the congenital defect arising from a neural tube defect that causes incomplete closure of the spinal cord and the meninges?

Answer 25

Spina bifida

Question 26

What supplements can reduce the likelihood of neural tube defects?

Answer 26

Folic acid supplements