Descending control of persistent pain: inhibitory or facilitatory?

Abstract

The periaqueductal gray matter (PAG) and the nucleus raphe magnus and adjacent structures of the rostral ventromedial medulla (RVM), with their projections to the spinal dorsal horn, constitute the "efferent channel" of a pain-control system that "descends" from the brain onto the spinal cord. Considerable evidence has recently emerged regarding… (More)

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