Central Sulcus: Dividing The Frontal And Parietal Lobes

Question 1. Corpus callosum
Answer:

Parts:

Genu
- It is the anterior end
- It lies 4 cm behind the frontal pole
Rostrum
- It is directed downwards and backwards from the genu
Trunk or body
- It is the middle part between genu and splenium
- Its superior surface is convex from before backwards and concave from side to side
- Its inferior surface is concave from before backwards and convex from side to side
Splenium
- It is the posterior end forming the thickest part of the corpus callosum
- It lies 6 cm in front of the occipital lobe

Fibres:

Forceps minor
- Made up of fibres of the genu that connect the two frontal lobes
Forceps major
- Made up of fibres of the splenium connecting the two occipital lobes
Tapetum
- Formed by some fibres from the trunk and splenium
- Forms the roof and lateral wall of the posterior horn and the lateral wall of the inferior horn of the lateral ventricle
The rostrum connects the orbital surfaces of the two frontal lobes

Question 2. Central sulcus
Answer:

Course:

It begins at the superomedial border of the hemisphere a little behind the midpoint between the frontal & occipital poles
It runs on the superolateral surface obliquely downwards & forwards & ends a little above the posterior ramus of the lateral sulcus

Question 3. Name the nuclei of cerebellum
Answer:

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