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Biofeedback as an experimental treatment for postural hypotension in a patient with a spinal cord lesion.

A man having severe postural hypotension resulting from a spinal cord lesion at level T3, was trained to raise and lower his blood pressure with the use of biofeedback. The procedure consisted of 11 learning sessions during which the subject's task was to effect specific changes of his blood pressure without skeletal muscle or respiratory involvement. Blood pressure was continuously monitored and reported to the subject, and positive verbal reinforcement for correct changes was also supplied. Analysis of the results revealed that the subject had learned to produce large voluntary changes in pressure. This learned ability was then applied in a standing position resulting in counteracting the postural hypotension. Suggestions for further research and implications for clinical applications are discussed.