5 Forebrain and ventricles

Question 1

What are the components of the diencephalon?

Functions?

Answer 1

Thalamus (relay).
Hypothalamus (autonomic + neuroendocrine.
Subthalamus (motor).
Epithalamus (melatonin).

Question 2

What are the 3 classes of nerve fibre in the white matter of the hemisphere?

Answer 2

Association: within hemi.
Commissural: between hemi.
Projection: to and from hemi.

Question 3

What are the subdivisions of the basal ganglia?

Answer 3

Caudate nucleus.

Lentiform nucleus: globus pallidus + putamen.

Question 4

What is the structure of the ventricular system?

Answer 4

2 lateral ventricles drain to IIIrd ventricle (in-between thalami). Drains via cerebral aqueduct to IVth ventricle (between cerebellum, pons and medulla). Drains to subarachnoid space.

Question 5

Functions of CSF in the brain?

Answer 5

Float to reduce traction.
Cushioning effect dampens trauma.
Removes metabolites.
Provides stable environment.

Question 6

Where is CSF predominantly recycled into the venous system?

Answer 6

Superior sagittal sinus.