Final answer:
The limbic system is the area of the brain that represents the rewarding and aversive qualities of sensations, primarily through structures like the amygdala and cingulate gyrus.
Step-by-step explanation:
The rewarding and aversive qualities of sensations are represented in the limbic system. The limbic system includes several brain structures such as the amygdala, which is involved in the sensation of fear and the recognition of fearful faces, and the cingulate gyrus, which helps to regulate emotions and pain. While there are other brain areas that process various facets of sensation and memory, such as the medial temporal lobe, ventromedial prefrontal cortex, superior temporal gyrus, and postcentral gyrus, the limbic system is primarily responsible for the emotional aspects of sensations.