[Vasomotor reactions in the abdominal skin and muscles of the cat in response to thermal and nociceptive stimuli].

The alterations of blood supply in restricted regions of the abdominal skin and the external oblique muscle were studied in anesthetized cats with photoplethysmographic technique. Local cooling of the abdominal skin decreased blood supply in skin and muscle whereas heating exerted an opposite effect. Vasomotor responses of skin and muscle abdominal blood vessels to somatic and visceral afferent fibre stimulation and injections of alpha- and beta-adrenergic agonists were mostly active in character. The abdominal wall vasomotor responses seem to be a proper experimental model for studying segmental vasomotor control.