Lecture 5- White Matter of the Cerebral Cortex

Question 1

What is white matter?

Answer 1

Myelinated axons that connect one part of the brain with another
Consists of 3 types of fibres

Question 2

3 types of fibres

Answer 2

Association fibres (intrahemispheric)
Commissural fibres (interhemispheric)
Projection fibres

Question 3

Parts of the corpus collosum

Answer 3

Rostrum
Genu
Body
Splenium

Question 4

Parts of internal capsule

Answer 4

Anterior limb
Genu
Posterior limb
Retrolentiform 
Sublentiform

Question 5

Fibres in internal capsule anterior limb

Answer 5

Frontopontine

Anterior thalamic radiation

Question 6

Fibres in internal capsule genu

Answer 6

Corticobulbar fibres

Superior thalamic radiations

Question 7

Fibres in internal capsule posterior limb

Answer 7

Corticospinal tract
Frontopontine fibres
Corticorubral fibres
Superior thalamic radiations

Question 8

Fibres in internal capsule retrolentiform

Answer 8

Parietopontine
Occipitopontine
Occipitotectal
Optic radiation
Posterior thalamic radiations

Question 9

Fibres in internal capsule sublentiform

Answer 9

Temporopontine
Some parietopontine
Auditory radiation

Question 10

Blood supply to the internal capsule

Answer 10

Posterior limb and retrolentiform——-Anterior choroidal artery (ICA)
Anterior limb———————————–Medial striate (ant cerebral)
Ant limb, genu and post limb————Lateral striate (middle cerebral)
Charcot’s artery, therefore often involved in strokes