Jonathan Egan

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We tested the hypothesis that sensitization to heroin enhances appetitive motivational processes involving food reward. In Experiment 1, sixteen rats were exposed to positive pairings of a light stimulus and food for 4 consecutive daily sessions. Then, the rats received either saline or heroin (2 mg/kg) injections before placement in activity monitors for 9(More)
BACKGROUND Traumatic brain injury is a major cause of mortality and morbidity worldwide. It can be worsened by secondary injury particularly with hypoxia or hypotension. Current prehospital guidelines emphasise regular measurement of peripheral oxygen saturation and blood pressure but there is no monitor in use to provide direct information relating to(More)
The treatment of depression occurring in patients undergoing chronic renal dialysis is discussed. This study was conducted on a Dialysis Unit where 10 Travenol dialyzers of the recycling single by-pass type are used to maintain a total of 22 patients. Imipramine in the usual dosage range and schedule was used when an antidepressant was indicated.
Rats on a 23 h food deprivation schedule were trained to run down a straight runway for a food reward. Neither amitriptyline nor mianserine had an effect on the running time for the food reward during the period of continuous reinforcement. However both antidepressants delayed the extinction of this response. It seems unlikely that this effect on extinction(More)
The relationships between predialysis and postdialysis erythrocyte transketolase activities and symptoms of uremic peripheral neuropathy were studied prospectively for 21 months in 19 chronic hemodialysis patients. In all patients the predialysis activity was observed to be sometimes greater and sometimes less than the postdialysis activity. These(More)
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