ORGANIZATION OF CEREBRUM; LATERAL VENTRICLE

Question 1

Central part of lateral ventricle

Roof, floor medial relations

Answer 1

Roof: Undersurface of the body of the corpus callosum
Floor: • Body of the caudate nucleus
• Upper surface of thalamus
• Stria terminalis and thalamostriate vein occupying between them.
Medially : Anterior part of the septum pellucidum, but more behind roof and floor meet because the body of the corpus callosum comesin direct contact with the
body of the fornix

Question 2

Anterior horn of lateral ventricle

Roof, floor, medial and anterior relations

Answer 2

Roof -under surface of anterior part of corpus callosum

Floor-formed by rostrum of the corpus callosum medially and head of the caudate
nucleus laterally

Medially -septum pellucidum

Anteriorly-genu of the corpus callosu,

Question 3

Posterior horn of lateral ventricle

Roof + lateral wall, floor + medial wall elevations

Answer 3

Roof and lateral wall - Tapetum (fibers
of corpus callosum), which separates optic radiation from the lateral wall of the posterior horn. 
Medial wall and floor - It shows two
elevations.
1.The upper elevation is called ‘bulb
of the posterior horn’ and it is
produced by forceps major (fibers of
splenium of corpus callosum).
2.The lower elevation is called
‘calcaravis’ and it is formed by
anterior part of calcrine sulcus.

Question 4

Inferior/ temporal horn

Roof, structures of floor.

Answer 4

Roof - 1.Tapetum of corpus callosum
on the lateral side 
2.tail of caudate nucleus
3.stria terminalis on the medial side 
4. amygdaloid body in the anteriormost part of the roof.
Floor - It shows two structures:
1. An elevation on the lateral side called ‘collateral eminence’, which is produced by inward projection of the intermediate part of the collateral sulcus.
2. Hippocampus is a prominent
longitudinal elevation and lies
medial to the collateral eminence