How to Control Your Sense of Pain & Pleasure | Huberman Lab Podcast #32

Touch & Pain

The interaction between touch and pain is complex, involving both biological and experiential factors. Andrew Huberman explains that our brain interprets electrical signals from the skin, which can evoke sensations of pleasure or pain depending on various factors, including prior experiences and innate responses 1. For instance, the direction of touch can influence whether a sensation is perceived as pleasurable or not, as seen in how cats respond to being petted 2.

The way in which these neurons that innervate these hairs sends information up to the brain bifurcates, actually it splits into brain centers that evoke a sense of pleasure or a sense of not pleasure.

--- Andrew Huberman

This highlights the importance of understanding how touch stimuli are processed and interpreted by the brain.

   

Neural Pathways

Neural pathways play a crucial role in how we perceive sensory information. Andrew Huberman describes the dorsal root ganglia (DRGs) as the largest cells in the body, with axons that extend to the skin and the brain, responding to various stimuli like touch, temperature, and chemicals 3. These neurons use a common language of electrical signals to communicate different sensations to the brain.

The neuron that responds to light touch sends electrical signals up toward the brain. The neurons that respond to cold or to heat or to habanero pepper, they only respond to the particular thing that evokes the electrical response.

--- Andrew Huberman

This intricate system allows us to accurately perceive and differentiate between various sensory inputs, despite their shared neural language.

   

Pain Perception

Pain perception is highly subjective and influenced by various factors, including expectations and visual cues. Andrew Huberman discusses how nociceptors in the skin send signals to the brain, which then assigns a value to these signals, determining whether they are perceived as painful 4. A striking example is the construction worker who felt excruciating pain from a nail that never pierced his skin, illustrating how perception can override physical reality 5.

The moment he realized that that nail had not gone through his foot, the pain completely evaporated.

--- Andrew Huberman

This underscores the complexity of pain and the potential for leveraging perception to manage pain effectively.