Answer by Kelly Jameson. Confidence votes 4.3K. The primary sensory cortex (or primary somatosensory cortex) is part of the postcentral gyrus in the brain, which forms part of the parietal lobe. The main function of the primary sensory cortex is it is a receptor for the sense of touch.parietal lobe.he sensory cortex is located in the occipital lobe. The occipital lobe is the visual processing center of the brain and is the primary cortex commonly called visual one. Edit. Share to: Answered.