Abstract
The effects of acute and chronic administration of Δ 9-THC, cannabis extract and control solution on the behavior of rats repeatedly exposed to an open-field arena have been studied. After the first dose both Δ 9-THC and cannabis extract significantly decreased defecation, grooming and rearing; ambulation was not affected. After 20 injections of both marihuana compounds the rats showed values for defecation, grooming and rearing near to those obtained during the predrug phase; control rats, however, showed a significant decrease in these parameters indicating habituation to the open-field. The results are discussed in terms of effects of marihuana on emotional behavior of rats.
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This work was partially supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP).
With a fellowship “iniciação científica” from FAPESP.
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Masur, J., Märtz, R.M.W. & Carlini, E.A. Effects of acute and chronic administration of cannabis sativa and (−)Δ9-trans-tetrahydrocannabinol on the behavior of rats in an open-field arena. Psychopharmacologia 19, 388–397 (1971). https://doi.org/10.1007/BF00404383
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DOI: https://doi.org/10.1007/BF00404383