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Hyperbaric Medicine Program Center (Drs. Faden, Hallenbeck, and Brown) Naval Medical Research Institute, and The Neurobiology Research Unit (Dr. Faden), Uniformed Services University of the Health Sciences, Bethesda, MD.
The effects of naloxone and thyrotropin releasing hormone (TRH) were compared in an incremental air embolization model of experimental stroke in dogs. Naloxone treatment significantly improved the cortical somatosensory evoked response and had a beneficial effect on local cerebral blood flow, whereas TRH treatment had no effect on these variables. These findings may implicate endorphins in the pathophysiology of stroke and indicate that naloxone may have a therapeutic role in this condition. Moreover, the lack of effect of TRH in this model, in contrast to its therapeutic effect in experimental spinal injury, indicates that the pathophysiologic responses to ischemic cerebral injury and traumatic spinal injury may differ.
Address correspondence and reprint requests to Dr. Faden. Chief, Neurobiology Research Unit, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814.
Accepted for publication March 30, 1982.
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