In a newly discovered vertebrate,the area in the somatosensory cortex devoted to body part A is larger than the area devoted to body part B.This means that body part A
A)is bigger than body part B.
B)has more sensory neurons.
C)is evolutionarily older.
D)has more motor control.

Question

Quizplus · Accepted Answer

The somatosensory cortex is responsible for processing sensory information from different body parts. The larger area devoted to body part A indicates that it has more sensory neurons, which causes a greater area of the somatosensory cortex to be activated when stimulated. It does not necessarily mean that body part A is physically larger, evolutionarily older, or has more motor control.

In a Newly Discovered Vertebrate,the Area in the Somatosensory Cortex