Question

The cerebral hemispheres are connected by a tract of nerve fibres called corpus callosum. These fibres are covered by :

Answer 1

A deep cleft divides the cerebrum longitudinally into two halves, which are termed as the left and right cerebral hemispheres. The hemispheres are connected by a tract of nerve fibres called corpus callosum.

Fibres of the tracts are covered with the myelin sheath, which constitute the inner part of cerebral hemisphere. They give an opaque white appearance to the layer and, hence, is called the white matter.

Hence, the correct answer is option “A”- Myelin sheath or medullary sheath.