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Definition. Pain threshold is defined as the minimum intensity of a stimulus that is perceived to be painful. Previously, this threshold was believed to be uniform across individuals, such that given intensity of a stimulus was thought to produce a given pain response.
Pain threshold is that point at which pain is just perceived; in more psychophysical terms, the 50% mark at which half the time there is pain and half the time there is no pain. Pain tolerance is an upper threshold, the point at which the patient no longer tolerates the presented stimulus and terminates stimulation by either withdrawing from it ...
Pain threshold is defined as the lowest stimulus intensity that reliably elicits the perception of pain. Attention as well as motivational and emotional factors are known to influence the pain threshold that can be measured in the laboratory.
Pain threshold, while similar in principle to other sensory thresholds, is unique in that it represents the transition point between two sensory experiences (non-painful and painful) rather than the detection of a sensory event per se.
The temperature that is called painful 50 percent of the time would be the pain detection or sensory threshold. In contrast to this relatively reproducible pain-detection threshold, tolerance for pain differs widely among individuals.
Pain threshold is the point at which pain is first detected and tolerance is the point at which pain can no longer be endured, with both measures typically quantified as stimulus intensity (e.g. temperature) or exposure time.
The threshold of pain or pain threshold is the point along a curve of increasing perception of a stimulus at which pain begins to be felt. It is an entirely subjective phenomenon.
