Rats given a 5 mg/kg injection of d-amphetamine did not respond for brain stimulation reward when tested under normal laboratory temperatures. In addition to the usual manifestations of stereotypy the rats were markedly hyperthermic. If the hyperthermia was prevented, however, by initially placing t
Facilitation of self-stimulation with high doses of amphetamine in the rat
โ Scribed by Robert M. Zacharko; Thomas B. Wishart
- Publisher
- Springer
- Year
- 1979
- Tongue
- English
- Weight
- 187 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0033-3158
No coin nor oath required. For personal study only.
โฆ Synopsis
Rats were trained to self-stimulate by interrupting a photobeam and brain stimulation was maintained for as long as the beam of light was broken. d-Amphetamine sulphate was then administered and response rate and total duration of stimulation were recorded. Both response rate and total duration were elevated by 1.0, 2.0, and 5.0 mg/kg dosages. The 1.4 s/response duration observed with saline was elevated to 2.0 s/response with 2.0 and 5.0 mg/kg doses. It was concluded that amphetamine's effects on self-stimulation are at least partially determined by the response requirements of the task employed.
๐ SIMILAR VOLUMES
Rats were permitted to turn on and off electrical stimulation of the medial forebrain bundle, by alternating between two photobeams running along opposite walls of a shuttle box. Entry into one beam (the "ON" beam) triggered the delivery of a succession of short, regularly occurring (1 Hz) pulse tra
Rats were trained to bar-press in order to obtain electrical stimulation of the medial forebrain bundle through chronically implanted electrodes. Dose-response and time-effect curves were determined for morphine (1.0-30 mg/kg), levorphanol (0.1 to 3.0 mg/kg), methadone (0.1-3.0 mg/kg), meperidine (1