Experiments were performed on six dogs over-trained before treatment, in differentiation of two instrumental responses, i.e. reinforced either by food or by sensory-social reward (petting by the experimenter). Chlorpromazine was injected intramuscularly (1.5 mg/kg) in two separate series. In the first series the drug was given four times during two weeks (twice a week). In the second series, it...

A 19-year-old African American man with a T12 spinal cord lesion underwent a T4-L5 thoracolumbar spinal fusion. Intraoperatively, his arterial blood pressure acutely increased from 110/60 to 260/130 mm Hg without a change in heart rate. The patient did not have pheochromocytoma, carcinoid syndrome, or thyroid storm. This presentation differs from autonomic dysreflexia because the spinal cord le...