Cannabinoids Help Scientists Explain Mysterious Stress-Pain Relationship

Article by Leaf Science

Cannabinoids Help Scientists Explain Mysterious Stress-Pain Relationship. Abnormal levels of the body’s natural painkillers may be the reason stress-prone individuals tend to experience more severe pain than others, according to new research.

Abnormal levels of the body’s natural painkillers may be the reason stress-prone individuals tend to experience more severe pain than others, according to new research.

Heightened pain in individuals who are stressed, anxious or depressed is widely recognized by scientists. While the link between mood and pain perception is poorly understood, genetic factors have long been thought to play a part.

Now researchers have connected a stress-prone genetic background with a dampened response of endocannabinoids – natural chemicals that act to decrease pain – in a region of the brain called the rostral ventromedial medulla. The region is known to play a role in regulating pain.

Dr David Finn, of the Galway Neuroscience Centre and the Centre for Pain Research at the National University of Ireland (NUI), shared his thoughts on the new findings in Wednesday’s press release.

“The link between emotionality and pain is fascinating and highly complex. This research suggests a key role for the brain’s endocannabinoid system in a genetic background prone to heighted stress or negative emotion.”

He adds that the findings could lead to new treatments of pain and stress-related psychiatric disorders.

The study, published online in the journal PAIN, pinpointed CB1 receptors in the rostral ventromedial medulla as a site of action for the brain’s cannabinoid painkillers. CB1 receptors are also activated by THC in marijuana and a responsible for the drug’s psychoactive effects.

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