European Psychiatry
1992
Graham Thornicroft, Graham Meadows, Pierluigi Politi
24 citations
Summary Forty-five cases of psychotic patients with admission urinalysis positive for cannabis were compared with psychotic controls without evidence of cannabis use. Cases and controls were matched for age, sex and year of admission, and were compared for socio-demographic data, circumstances of admission, diagnosis, and symptoms at admission. Three differences were found: cases were more...
Pharmacology, Biochemistry, and Behavior
November 1991
H M Emrich, M M Weber, A Wendl et al.
Measurements of binocular depth inversion using a stereoscopic slide projection with polarized light were performed in healthy volunteers before and after cannabis intake. Since binocular depth inversion represents an illusion occurring in the perception of semantically meaningful objects projected in a 3-D inverted fashion, the hypothesis can be tested that cannabis-induced "psychedelic...
Pharmacology, Biochemistry, and Behavior
November 1991
Andrew C. Scallet
Several laboratories have reported that chronic exposure to delta-9-tetrahydrocannabinol (THC) or marijuana extracts persistently altered the structure and function of the rat hippocampus, a paleocortical brain region involved with learning and memory processes in both rats and humans. Certain choices must be made in designing experiments to evaluate cannabis neurotoxicity, such as dose, route...
Fortschritte der Neurologie · Psychiatrie
November 1991
J Fischer, K L Täschner
The present study tries to find an answer to the question, whether the consumption of cannabis can cause flashbacks, and, if so, under what circumstances they occur. This is of interest for the treatment, prognosis and also from the legal viewpoint. The definition of a flashback is often unclear. Empirical investigations are often not sufficiently comparable, the supplementary data are very...
British Journal of Addiction
September 1, 1991
H R Chaudry, H B Moss, A Bashir et al.
The purpose of this preliminary investigation is to systematically characterize the signs and symptoms of cannabis psychosis in individuals who presented for psychiatric treatment in Pakistan after ingestion of bhang; a beverage containing cannabis. In order to control for the behavioral effects of cannabis alone, symptoms produced by bhang ingestion among non-patients consuming the same...
Acta Psychiatrica Scandinavica
February 1, 1991
A G Imade, J C Ebie
The aim of this study was to find out whether there are any similarities between cannabis psychosis on the one hand and schizophrenia and mania on the other, and to delineate any consistency in the pattern of clinical symptoms of cannabis psychosis. Relevant data were collected from patient's case-notes depicting biographical information and the frequencies of mental symptoms. Age and duration...
The British Journal of Psychiatry
July 1, 1990
G Thornicroft
A review of the evidence shows that there is no convincing support for a separate clinical diagnosis of 'cannabis psychosis'. Cannabis can, however, produce brief acute organic reactions and, in moderate to heavy doses, psychotic episodes in clear consciousness. Ingestion in naive users or increasingly heavy use in habitual users can precipitate a schizophreniform episode. Heavy users may have...
Pharmacology, Biochemistry, and Behavior
September 1989
S J Heishman, M L Stitzer, J E Yingling
This study investigated the smoking topography of marijuana and its effect on heart rate, subjective reports, and cognitive/psychomotor task performance. Male subjects (N = 12) with histories of moderate marijuana use smoked ad lib one cigarette containing 0, 1.3, or 2.7% delta 9-THC on separate days. Smoking topography measures revealed smaller puff and inhalation volumes and shorter puff...
Journal of Ethnic and Migration Studies
April 1, 1989
Chris Ranger
5 citations
This paper examines the social factors which contribute to the construction of the controversial disease category of ‘cannabis psychosis’. Traditionally, medicine has been viewed as a science, and medical knowledge, unlike medical practice, has been treated as existing independently of any social forces. The social constructionist approach to medicine is based on the view that medical knowledge...
Psychiatric Bulletin
March 1, 1989
Lyn S. Pilowsky, Parimala Moodley
3 citations
The recent report on 'cannabis psychosis' (Littlewood, Psychiatric Bulletin, 12, 486-488) and psy chiatrists' conceptualisations of this challenged its