PMID: 6403967Jan 1, 1983Paper

Amphetamine and apomorphine restore tactile placing after motor cortex injury in the cat

Psychopharmacology
D M Feeney, D A Hovda

Abstract

Unilateral motor cortex injury in the cat results in a prolonged loss of tactile placing in the forelimb contralateral to the injury. Amphetamine (5 mg/kg) temporarily reverses this tactile placing deficit as early as 4 days following the injury. Racemic amphetamine was found to produce a significantly more prolonged restoration of placing than the d isomer, which was significantly more effective than the l isomer. Haloperidol (0.4 mg/kg) blocked the amphetamine-induced recovery of placing responses and also blocked placing in nondrugged cats showing partial spontaneous recovery. This dosage of haloperidol had no effect on tactile placing in normal cats. Apomorphine at moderate dosages (0.25 and 0.5 mg/kg) produced a weak restoration of tactile placing in motor cortex-injured animals. These pharmacological data suggest that the loss of tactile placing after motor cortex injury is due to a depression of catecholaminergic function, which is temporarily reversible by catecholaminergic stimulation.

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Citations

Aug 1, 1983·Physiology & Behavior·D L Wolgin, P Kehoe
Mar 1, 1990·Pharmacology, Biochemistry, and Behavior·M G Boyeson, D M Feeney
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