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Full-Text Articles in Social and Behavioral Sciences
Acute Effects Of Cocaine On Spontaneous And Discriminative Motor Functions: Relation To Route Of Administration And Pharmacokinetics, Abdulrazaq Imam
Acute Effects Of Cocaine On Spontaneous And Discriminative Motor Functions: Relation To Route Of Administration And Pharmacokinetics, Abdulrazaq Imam
Abdulrazaq A. Imam
Rats administered cocaine i.p. and p.o. (7.5-30 mg/kg) showed dose-related increases in locomotor (LM) and small-movement activities, with LM rates decreasing over the 2-hr session, except at the largest i.p. dose, for which rates were greater in the 2nd hr. Lidocaine p.o. (15-30 mg/kg) did not increase activity. Relating the area under the curve measures for serum cocaine (concentration-time) and LM activity (LM activity-time) for 2 hr postadministration indicated that cocaine was about twice as potent i.p., compared to p.o., in increasing LM activity. Cocaine (i.p. and p.o.) produced dose-related decrements in both discriminative motor control performance and in task …
Stock Optimizing In Choice When Toke Deposit Is The Operant, Abdulrazaq Imam, J Widholm, A Silberberg, S Hursh, F Warren-Boulton
Stock Optimizing In Choice When Toke Deposit Is The Operant, Abdulrazaq Imam, J Widholm, A Silberberg, S Hursh, F Warren-Boulton
Abdulrazaq A. Imam
Each of 2 monkeys typically earned their daily food ration by depositing tokens in one of two slots. Tokens deposited in one slot dropped into a bin where they were kept (token kept). Deposits to a second slot dropped into a bin where they could be obtained again (token returned). In Experiment 1, a fixed-ratio (FR) 5 schedule that provided two food pellets was associated with each slot. Both monkeys preferred the token-returned slot. In Experiment 2, both subjects chose between unequal FR schedules with the token-returned slot always associated with the leaner schedule. When the FRs were 2 versus …
Speed Contingencies, Number Of Stimulus Presentations, And The Nodality Effect In Equivalence Class Formation, Abdulrazaq A. Imam
Speed Contingencies, Number Of Stimulus Presentations, And The Nodality Effect In Equivalence Class Formation, Abdulrazaq A. Imam
Abdulrazaq A. Imam
Rats worked under a fixed-ratio (FR) 45 schedule of reinforcement during 4-hr long sessions either in 16 15-min work periods (2 rats in Exps 1 and 3) or in a single work period (3 rats in Exps 2 and 4) while receiving varying amounts of external food. In Exps 1 and 2, a fixed amount of external food was provided in different conditions, whereas in Exps 3 and 4, both earned and total food intake were fixed to a daily maximum. Consumption and responding decreased with availability compared to nonavailability of external food and systematically declined with increasing amounts of …