A sensual leg caress evokes a different somatosensory cortex response when a heterosexual man believes it comes from an attractive woman rather than a man. This best illustrates the impact of on our brain's sensory response.

Cognition

Explanation:

The sensual caress evokes a different somatosensory cortex response when the action is performed by the women to men but when the same action is performed by a men to men. There is no such response, this is because of the cognition response.

In this the person already has the response in the mind. These responses are generated at the time of reading , listening to radio, some touch of opposite sex.

Hence, the correct answer is Cognition.