Lateral Ventricle

Lateral Ventricle

Question 1. Discuss the boundaries of the posterior horn of the lateral ventricle.
Answer.

Boundaries It is quadrangular or diamond-shaped in coronal section and presents a roof, lateral wall, floor, and medial wall.

Roof, lateral wall and floor: These are formed by tapetum.

Posterior horn of lateral ventricle

Medial wall: It is formed:

• In the upper part by a bulb of the posterior horn (an elevation/raised area formed by the forceps major).
• In the lower part calcar avis (a raised area formed by the anterior part of calcarine sulcus).

Question 2. Discuss the boundaries of the inferior horn of the lateral ventricle.
Answer.

Boundaries It appears on a transverse slit in the coronal section and presents the roof and floor.

Roof: It is formed by:

• Tapetum, covered on its superficial surface by optic radiation and inferior longitudinal fasciculus
• Tail of caudate nucleus
• Stria terminalis
• Amygdaloid body (sometimes)

Choroid plexus in inferior horn

Floor: From lateral to medial side, it is formed by:

• Collateral eminence, formed by collateral sulcus
• The hippocampus is covered by a thin layer of white matter called the alveus
• Fimbria, formed by alveus
• Choroid plexus