1.1 Basic Topography Of Nervous System

Question 1

What is the name of the sulcus that separates the frontal lobe from the parietal lobe?

Answer 1

Central sulcus

Question 2

Where is the primary motor cortex located?

Answer 2

In the precentral gyrus

Question 3

Where is the sensory cortex contained?

Answer 3

In the post central gyrus

Question 4

What does the lateral sulcus separate?

Answer 4

The frontal and parietal lobes from the temporal lobe

Question 5

What are the layers of the meninges called?

Answer 5

Dura mater
Arachnoid mater
Pia mater

Question 6

Which meningeal layer is the only layer present in the vertebral column?

Answer 6

Dura mater

Has two layers, thick outer and thinner inner which is present in the vertebral column

Question 7

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

Answer 7

CN V

MMA

Question 8

Which meningeal layer is avascular?

Answer 8

Arachnoid mater

Also has no innervation

Question 9

What is the function of the ventricles of the brain?

Answer 9

Production of CSF

Question 10

Which ventricle/s contain the most choroid plexus?

Answer 10

The two lateral ventricles, which are also the largest

Question 11

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

Answer 11

Cerebral aqueduct

Question 12

What is the falx cerebri?

Answer 12

A fold of dura mater that separate the right and left cerebral hemispheres

Question 13

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

Answer 13

Tentorium cerebelli

Question 14

What is the corpus callosum?

Answer 14

A white mater structure that connects the right and left hemispheres

Question 15

What are the main arteries that supply blood to the brain?

Answer 15

Paired vertebral arteries
Paired internal carotid arteries
These form the Circle of Willis

Question 16

At what spinal levels do the common carotid arteries birfurcate?

Answer 16

C4

Question 17

Which arteries do the vertebral arteries arise from?

Answer 17

The subclavian arteries

Question 18

How do the vertebral arteries reach the brain?

Answer 18

Arise from subclavian arteries
Ascend up posterior side of the neck, through holes in the transverse processes of the cervical vertebrae
They enter the cranial cavity via the Foramen magnum and give off branches before converging to form the basilar artery, which then bifurcates to form the posterior cerebral arteries

Question 19

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

Answer 19

Anterior cerebral arteries (terminal branches of ICAs)
Internal carotid arteries
Posterior cerebral arteries (terminal branches of vertebrals)

(Connect through anterior communicating arteries and posterior communicating arteries)

Question 20

Which artery supples most of the medial portion of the cerebrum?

Answer 20

Anterior cerebral arteries

Question 21

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

Answer 21

The lateral part

Question 22

Considering the motor homonculus, which region of the body is represented most laterally in the primary motor cortex?

Answer 22

Face

Lower limb most medially, then upper limb, then face

Question 23

CSF circulates in which space in the brain?

Answer 23

The subarachnoid space

Question 24

Which lobe is the hippocampus located in?

Answer 24

Temporal lobe

Question 25

The internal capsule runs between which structures?

Answer 25

The lentiform nucleus and the thalamus