Question

If the corpus callosum is removed in the mammalian brain then what will be affected?
A. Coordination of cerebrum
B. Involuntary activity of brain
C. Co-ordination of cerebellum
D. Behaviour and emotional disturbances

Answer 1

Hint: Brain is the central organ of the nervous system of a mammal. Brain with the spinal cord makes the central nervous system. The brain consists of the cerebrum, the brainstem and the cerebellum.

Complete Answer:
- The corpus callosum is a large nerve fiber bundle. It is a C-shaped nerve fiber bundle.
- Corpus callosum is found beneath the cerebral cortex.
- The corpus callosum stretches along the midline of the brain and connects the left and right cerebral hemispheres.
- It makes up the largest connection of white matter tissues that are found in the brain. It is found only in the placental animals. It consists of about 200-300 million axonal projections.
- Part of the corpus callosum forms the roof of the lateral ventricles.

The corpus callosum has the four parts :
1. Rostrum – The lower much thinner part of the corpus callosum is called the rostrum.
2. Genu – The front part of the corpus callosum is called the genu.
3. Trunk or body – The trunk or body of the corpus callosum lies between the splenium and the genu.
4. Splenium – It is the end part of the corpus callosum towards the cerebellum.

- A narrowed part that is present between the trunk and splenium is called as isthmus. It is an important structural and functional part of the brain.
Therefore, it has been clear from the above discussion that if the corpus callosum is removed in the mammalian brain then coordination of cerebrum will be affected.

Hence, option A is the correct option for this question.

Note: Brain controls most of the activities of the body. Brain receives the information from the sense organs and makes decisions according to the instructions that are sent by the sense organs of the body or other parts of the body. The brain is protected by the skull bones of the head.