PT  - JOURNAL ARTICLE
AU  - K L Marquis
AU  - N C Paquette
AU  - R P Gussio
AU  - J E Moreton
TI  - Comparative electroencephalographic and behavioral effects of phencyclidine, (+)-SKF-10,047 and MK-801 in rats.
DP  - 1989 Dec 01
TA  - Journal of Pharmacology and Experimental Therapeutics
PG  - 1104--1112
VI  - 251
IP  - 3
4099  - http://jpet.aspetjournals.org/content/251/3/1104.short
4100  - http://jpet.aspetjournals.org/content/251/3/1104.full
SO  - J Pharmacol Exp Ther1989 Dec 01; 251
AB  - Female Sprague-Dawley rats prepared with chronic i.v. cannulas and/or cerebrocortical electrodes were administered sequentially increasing doses of phencyclidine (PCP, 0.1-6.4 mg/kg/injection), (+)-SKF-10,047 [(+)-N-allynormetazocine] (0.4-25.6 mg/kg/injection) or MK-801 [(+)-5-methyl-10,11-dihydro-5H-dibenzo[a,d]-cyclohepten-5,10-imine maleate] (0.01-0.64 mg/kg/injection). Effects on overt behavior, cortical EEG power spectra, locomotor activity and rotarod performance were assessed. Quantitative EEG spectral parameters (peak, mean and edge frequency; total and relative power; time domain descriptors mobility and complexity) were analyzed from the global frequency range of 1 to 50 Hz. Increasing doses of each drug produced increases in EEG spectra power from 1 to 50 Hz which was associated with a slowing of the peak frequency. PCP and MK-801 produced decreases in the mean frequency, mobility and edge frequency whereas (+)-SKF-10,047 produced increases in these spectral parameters. Moreover, (+)-SKF-10,047 increased complexity whereas MK-801 decreased complexity and PCP did not change this parameter. Total spectral power from 20 to 50 Hz was increased by (+)-SKF-10,047 and PCP, but was not changed by MK-801. Each drug increased spontaneous locomotor activity. At the highest doses, PCP and MK-801 decreased activity whereas (+)-SKF-10,047 was lethal. Each drug disrupted rotarod performance. The rank order of potency for each effect was: MK-801 greater than PCP greater than (+)-SKF-10,047. The data indicate that subtle differences in the effects of these drugs can be detected using EEG power spectral analysis.(ABSTRACT TRUNCATED AT 250 WORDS)