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Titolo:
EFFECTS OF DESIPRAMINE AND FLUVOXAMINE ON TIMING BEHAVIOR INVESTIGATED WITH THE FIXED-INTERVAL PEAK PROCEDURE AND THE INTERVAL BISECTION TASK
Autore:
HO MY; ALZAHRANI SSA; MARTINEZ DNV; CABRERA ML; BRADSHAW CM; SZABADI E;
Indirizzi:
UNIV NOTTINGHAM,QUEENS MED CTR,DEPT PSYCHIAT NOTTINGHAM NG7 2UH ENGLAND UNIV NOTTINGHAM,QUEENS MED CTR,DEPT PSYCHIAT NOTTINGHAM NG7 2UH ENGLAND
Titolo Testata:
Psychopharmacology
fascicolo: 3, volume: 125, anno: 1996,
pagine: 274 - 284
Fonte:
ISI
Lingua:
ENG
Soggetto:
RATE 72-SECOND SCHEDULE; DIFFERENTIAL-REINFORCEMENT; ATYPICAL ANTIDEPRESSANTS; TIME-ESTIMATION; PERFORMANCE; DRUGS; METHAMPHETAMINE; INHIBITION; IMIPRAMINE;
Keywords:
ANTIDEPRESSANTS; DESIPRAMINE; FLUVOXAMINE; TIMING; FIXED-INTERVAL PEAK PROCEDURE; INTERVAL BISECTION TASK; RAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Physical, Chemical & Earth Sciences
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
39
Recensione:
Indirizzi per estratti:
Citazione:
M.Y. Ho et al., "EFFECTS OF DESIPRAMINE AND FLUVOXAMINE ON TIMING BEHAVIOR INVESTIGATED WITH THE FIXED-INTERVAL PEAK PROCEDURE AND THE INTERVAL BISECTION TASK", Psychopharmacology, 125(3), 1996, pp. 274-284

Abstract

Acute treatment with antidepressant drugs is known to increase the mean interresponse time (IRT) in the IRT>72-s schedule of reinforcement. In order to examine the possibility that this effect may reflect an action of the antidepressants on timing processes, we tested the effects of two antidepressants, desipramine and fluvoxamine, on behaviour maintained under two other timing schedules in rats. In the fixed-interval peak procedure (fixed-interval 30-s), acute treatment with desipramine (8 mg kg(-1)) reduced response rate, whereas acute treatment with fluvoxamine (8 mg kg(-1)) increased it. Neither drug significantly altered the time to attainment of peak response rate or the Weber fraction. In the interval bisection task (standard durations 2 s and 8 s); the bisection point was not significantly altered by acute treatment with either drug. Chronic treatment with desipramine (8 mg kg(-1) b.d.) had no effect on any of the indices of timing under either schedule. Chronic treatment with fluvoxamine (8 mg kg(-1) b.d.) reduced the time to attainment of peak response rate but had no effect on the Weber fraction under the fixed-interval peak procedure. and did not alter the bisection point or Weber fraction under the interval bisection procedure. The failure of desipramine and fluvoxamine to increase the time to peak response rate or the bisection point at doses that significantly altered operant response rate suggests that the effect of these drugs on IRT schedule performance is unlikely to reflect an interaction with timing processes.

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Documento generato il 30/03/20 alle ore 19:01:46