Health
Research found that rubbing and stroking the skin against pruritus rather than scratching
Key Point
- Itching sensation is believed to have evolved as a way to protect the skin from parasites
- This study demonstrated in the mouse that stroking the skin was more effective in relieving itching
- Researchers said that stroking reduced the activity of spinal cord neurons that respond to itching
The first reaction to itching of the skin in most people is scratching. Experts believe that a scratch is the act of sending a low-level pain signal to the brain to temporarily deflect it from an itch. New research now shows that rubbing or stroking the skin is better than scratching the itch.
The itch sensation, technically called itching, is believed to have evolved as a way to protect the skin from the accumulation of parasites and dead cells. The skin is the first line of defense and has evolved in several unique ways to stay intact.
Although it can be very difficult to resist scratching itching, the act can damage the skin, especially the sensitive areas. SAnti-itch medicine Serotonin and others can actually trigger the itch signal.
The researchers Mice stroking the skin have less damage to the skin and are effective in relieving itching.
their Paper presentation Researchers at the Journal of Neuroscience have emphasized that stroking and rubbing the skin reduces the activity of spinal cord neurons that respond to itching.
As part of the study, experts in Philip Frost Dermatology and Dermatology and experts at the Miami Itch Center at the University of Miami School of Medicine were able to apply itching-inducing chemicals under the skin of mice. It caused the urge to scratch.
The researchers then began recording the electrical response during the stroking of the dorsal horn neurons in the spinal cord of these animals. The dorsal horn constitutes the central gray matter associated with both tactile and itching.
They found that more neurons fired when the mouse was stroked after the stroke was over. The researchers noted that the increased number of neurons fired in response to rubbing the skin corresponded to an added haptic rather than an increased itching.
This study provides a mechanistic understanding of reducing tactile-induced itch. As a result, stroking the skin initiates a cascade that activates sensory neurons beneath the skin and spinal cord anti-itch interneurons, a mechanism that helps relieve itch.
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