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Origins of Pain

painful shoulder

Researchers have identified the nerve-signaling pathway behind the deep, sustained pain that sets in following injury.

Researchers identify pathway that drives sustained pain following injury. Withdrawing one’s hand to avoid injury and soothing the pain of that injury are two distinct evolutionary responses, but their molecular origins and signaling pathways have eluded scientists thus far.

Now research led by investigators at Harvard Medical School, published Dec. 10 in Nature, identifies the nerve-signaling pathway behind the deep, sustained pain that sets in immediately following injury. The findings also shed light on the different pathways that drive reflexive withdrawal to avoid injury and the subsequent pain-coping responses.

Clinical observations of patients with neurolog...

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