Week 2 - Wet Room

Question 1

What kind of fibres pass through the corpus callosum?

Answer 1

Commisural fibres

Question 2

What are the 4 pasts of the corpus callosum?

Answer 2

Rostrum
Genu
Body
Splenium

Question 3

What is the septum pellucidum?

Answer 3

Thin sheet which lies in the mid saggital plane and separates the anterior horns of the two lateral ventricles

Question 4

What is the septum pellucidum continuous with?

Where does it extend?

Answer 4

Superiorly with the corpus callosum and inferiorly with the fornix

It extends posteriorly as far as the interventricular foramen (the connection between the lateral ventricle on each side and the 3rd ventricle

Question 5

What is the fornix?

Answer 5

Bundle of fibres which links the hippocampus with the mammillary bodies of the hypothalamus

Question 6

What bulbous projection exists on the floor of the lateral ventricle?

Answer 6

Caudate nucleus

This is one of the basal nuclei

Question 7

What is the function of the thalamus?

Answer 7

The thalamus is a sensory relay area made up of smaller masses of grey matter nuclei, each with different functions.

Most of the general sensory information from the body relays to a nucleus called the venture-postero lateral (VPL) nucleus of the thalamus

Question 8

What is the function of the hypothalamus?

Answer 8

Responsible for production of many essential hormones, These govern temperature regulation, thirst, hunger, sleep, mood, sex drive, and the release of other hormones within the body.

This area of the brain houses the pituitary gland and other glands in the body.

Question 9

The pineal gland lies immediately posterior to the thalamus.

Where are the colliculi in relation to the pineal gland?

Answer 9

Immediately inferior

Question 10

What is the pineal gland?

Answer 10

Small endocrine gland in the vertebrate brain.
It produces melatonin, a serotonin derived hormone, which affects the modulation of sleep patterns in both seasonal and circadian rhythms.

Question 11

What do the globus pallidus and the putamen form?

Answer 11

Lentiform nucleus

Question 12

What is the corpus striatum?

Answer 12

Caudate nucleus + lentiform nucleus

Basically the basal ganglia

Question 13

What is the internal capsule made up of?

Answer 13

Myelinated axons (white matter)
Projection fibres (connect cerebral hemispheres with other parts of the brain

Question 14

What are the parts of the internal capsule?

Answer 14

Anterior limb
Genu
Posterior limb

Question 15

Which cerebral artery through one of its branches supplies the internal capsule?

Answer 15

Anterior cerebral artery

Question 16

What group of structures is the substantia nigra functionally a part of?

Answer 16

Basal ganglia

Question 17

Where would the red nucleus be in relation to the substantia nigra?

Answer 17

Posterior

Question 18

Which part of the pons would motor fibres that form the medial lemniscus occupy?

Answer 18

Rostral Medulla

Question 19

What level does the spinal cord terminate in adults?

Answer 19

L2

Question 20

How does the presence of white and grey matter differ at each spinal cord segment?

Answer 20

Higher levels contain greater amounts of white matter.

this is because ascending tracts gain fibres at each successive level whereas the opposite is true for descending fibres

Question 21

Which aspect of the spinal cord receives sensory nerve fibres?

Answer 21

Dorsal

Question 22

From which aspect of the spinal cord do motor fibres project?

Answer 22

Ventral

Question 23

Why does the the size of the ventral grey horn vary along the spinal cord?

Answer 23

Presence of motor neurones innervating the upper and lower limbs

Question 24

What is the name of the hole in the middle of the spinal cord and what does it contain?

Answer 24

Central canal and CSF