Septal inhibition and timing behavior in the rat

Amygdaloid lesions and behavioral inhibition in the rat.

“…A similar deficit in DRL-20 performance in the rat has been reported with septal lesions (Ellen, Wilson & Powell, 1964) and continuous low level septal stimulation (Kaplan, 1965). The authors of both experiments attribute the DRL deficits to impairments in respon.se inhibition rather than impaired temporal discrimination.…”

“…Disruption of both fixed interval responding (Ellen & Powell, 1962) and DRL performance (Ellen, Wilson & Powell, 1964) have also been reported in rats with septal lesions.…”

“…First, in order to perform weIl on this schedule, an animal must learn to withhold a bar-pressing response. Second, data are available for comparative purposes on the effects of septa1 (Ellen, Wilson & Powell, 1964) and hippocampal (Clark & Isaacson, 1965;Schmaltz & Isaacson, 1966) lesions on DRL performance.…”

Discrimination of response feedback following septal lesions

“…The overresponding by animals with septal lesions on a DRL (differential reinforcement of low rates of response) reinforcement schedule is a well-documented phenomenon (Ellen, Wilson & Powell, 1964;Burkett & Bunnell, 1966;Carey, 1967Carey, , 1968. However, despite the ample body of evidence describing the behavioral effect, the basis of this overresponding by septal animals is still obscure.…”

Control of Timing Behavior by Contingent Photic Stimulation in Cats

“…After 17 sessions were carried out, the CR was recovered. With respect to the temporal discrimination function, there have been many studies of timing behavior in rats using the differential reinforcement of low res ponse rate schedule (Anger 1956, Kelleher et al 1959, Ellen et al 1964, Ellen and Butter 1969. These studies and others on monkeys (Brady andConrad 1960, Stamm 1963) or rabbits (Suzuki and Saito 1970) have consistently indicated that animals responded at very short inter-response times in earlier stages of the training, and as the training progressed they tended to show longer inter-response times in accordance with requirements of the schedule.…”