Biomedical subjects
B Neumann
Publications and source records attributed to B Neumann.
Treatment with dexamethasone alters yawning behavior induced by cholinergic but not dopaminergic agonist.
Because stressful manipulations have been reported to modify drug-induced yawning, the present study investigated the effects of single and repeated treatment with a synthetic glucocorticoid, dexamethasone (DEXA) on apomorphine- and pilocarpine-induced yawning in male rats. Neither single nor repeated treatment with DEXA altered apomorphine-induced yawning. Single administration of DEXA, however, resulted in an increased number of yawns induced by pilocarpine. Conversely, repeated administration of DEXA led to a decreased number of yawns induced by pilocarpine. In conclusion, the present findings show that dopaminergic and cholinergic are distinctly altered by DEXA, in terms of yawning behavior when animals received DEXA.
Trends in adolescent alcohol consumption in Halifax, Nova Scotia--1970-1986.
The drinking behaviours of 1,128 students from grades 7 to 12 in Halifax, Nova Scotia were surveyed and the results were compared to surveys done on similar samples of adolescents in 1970, 1976 and 1983. The survey instruments were self-administered, anonymous questionnaires administered in class groups. In the 1986 survey, while no differences (p greater than .05) in the frequency of drinking episodes exists between males and females, the former group were found to be drinking more heavily. Since 1983, the percentage of drinkers has declined significantly (p less than .05) among both sexes. The percentage of frequent drinkers (once a week or more) and heavy drinking (6+ drinks per sitting, more than once per week) has not changed significantly (p greater than .05) in either sex.