Pain Perception

In this video I go into more detail on pain perception. First I discuss the importance of pain as a signal of danger or harm to the body. Next I explain the two types of nerve fibers which carry different pain messages: A-delta fibers for sharp, intense pains and C-fibers for dull, throbbing pains. I provide a mnemonic for remembering … Read More

Touch, Haptic Perception, & the Somatosensory Cortex

In this video I describe touch sensation and haptic perception, which refers to exploring the world by grasping. I outline the types of receptor in the skin including mechanoreceptors, thermoreceptors, and nocireceptors, and then discuss how signals are mapped out according to sensitivity in the somatosensory cortex of the parietal lobe. This mapping research was initially conducted by Wilder Penfield … Read More