Q. Which is the brain region that receives conscious sensory information? Which is the brain region that triggers the voluntary motor activity?

In the brain conscious sensory information is received by the neurons situated in a special region called sensory gyrus or postcentral gyrus. Gyri are the convolutions of the cerebrum each of the two postcentral gyri are located in one of the parietal lobes of the cerebrum.

The voluntary motor activity (voluntary muscle movement) is commanded by neurons situated in the motor gyrus or precentral gyrus each of the two precentral gyri is located in one of the frontal lobes of the cerebrum.

The names post-and pre-central refer to the fact that the motor and sensory gyri are spaced apart in each cerebral hemisphere by the sulcus centralis, a fissure that separates the frontal lobes and parietal.