1. Intro And Recap

Question 1

What is grey matter composed of?

Answer 1

Cell bodies and dendrites. Is highly vascular.

Question 2

What is white matter composed of?

Answer 2

Axons and myelin.

Question 3

What is the PNS equivalent of grey matter and white matter?

Answer 3

Grey - ganglion.

White - peripheral nerve.

Question 4

What is a funiculus in the spinal cord and in what direction do impulses travel?

Answer 4

A segment of whit matter containing multiple distinct tracts. Impulses travel in multiple directions?

Question 5

What is a tract in the spinal cord and in what direction do impulses travel?

Answer 5

An anatomically and functionally defined white matter pathway connecting two distinct regions of grey matter. Impulses travel in one direction.

Question 6

What is a fasciculus in the spinal cord?

Answer 6

A subdivision of a tract supplying a distinct region of the body.

Question 7

What is Rexed’s laminae?

Answer 7

The organisation of grey matter in the spinal cord into cell columns. The motor neurones supplying a given muscle arise from multiple segments and form a distinct population of neurone in the CNS, a nucleus.

Question 8

What is a nucleus in the CNS?

Answer 8

A collection of functionally related cell bodies in grey matter.

Question 9

What is the cortex in the CNS?

Answer 9

The folded sheet of cell bodies found on the surface of the brain. Is grey matter.

Question 10

What is a fibre in the CNS?

Answer 10

An axon in association with its supporting cells eg oligodendrocytes. Is found in white matter and used synonymously with axon.

Question 11

What are association fibres?

Answer 11

Fibres which connect cortical regions within the same hemisphere of the brain.

Question 12

What are commissural fibres?

Answer 12

Fibres which connect the left and right hemispheres or cord halves.

Question 13

What are projection fibres?

Answer 13

Fibres which connect the cerebral hemispheres with the cord/brainstem and viva versa.

Question 14

What is the function of the midbrain?

Answer 14

Eye movements and reflex responses to sound and vision.

Question 15

What is the function of the pons?

Answer 15

Feeding and sleeping.

Question 16

What is the function of the medulla?

Answer 16

Cardiovascular and respiratory centres. Contains a major motor pathway, the medullary pyramids.

Question 17

What does the precentral gyrus of the brain contain?

Answer 17

The primary motor cortex.

Question 18

What does the postcentral gyrus of the brain contain?

Answer 18

The primary sensory cortex.

Question 19

What is the role of the parahippocampal gyrus of the brain?

Answer 19

Key cortical region for memory encoding.

Question 20

What is the role of the uncus of the brain?

Answer 20

Part of the temporal lobe which has an important olfactory role.

Question 21

What does the corpus callous of the brain contain?

Answer 21

Fibres connecting the two cerebral hemispheres.

Question 22

What is the role of the thalamus of the brain?

Answer 22

Sensory relay station projecting to the sensory cortex.

Question 23

What is the tole of the cingulate gyrus of the brain?

Answer 23

Cortical area important for emotion and memory.

Question 24

What is the role of the fornix of the bran?

Answer 24

Major output pathway from the hippocampus.

Question 25

What is the role of the tectum of the brain?

Answer 25

Dorsal part of the midbrain involved in involuntary responses to auditory and visual stimuli.

Question 26

What are the brain ventricles?

Answer 26

Cavities in the brain containing choroid plexus which makes 600-700ml of CSF per day.

Question 27

Where does CSF circulate though and where is it absorbed?

Answer 27

Circulated through the ventricular system and subarachnoid space. Is reabsorbed at the arachnoid granulations (projections in the arachnoid membrane into the dural venous sinuses).

Question 28

What are the main roles of the cerebellum?

Answer 28

Motor control and coordination.