Showing papers by "Russell M. Church published in 1990"
TL;DR: Study of covariance structures in the data implicated scalar variance in the memory for time as well as in the decision process, but the correlation pattern ruled out multiple access to memory within a trial.
341 citations
TL;DR: Three facts of time perception are described based upon a temporal generalization task for rats in which food reinforcement is delivered on half the trials following the first lever-press response after some fixed interval after signal onset.
302 citations
TL;DR: It is concluded that neonatal hypoglycemia of 10 hours duration results in adaptive difficulties in rhesus monkeys but, if special attention is devoted to these animals, there are no enduring cognitive or behavioral deficits.
Abstract: Neonatal hypoglycemia has been implicated as a cause of brain damage that may lead to cognitive, sensory, psychomotor, or behavioral deficits in children. Because nonhuman primates can serve as useful models of many aspects of human behavior, we have produced neonatal hypoglycemia in newborn rhesus monkeys to identify the specific nature of the deficits produced. Neonatal hypoglycemia was produced by the continuous subcutaneous delivery (begun in utero) of insulin for up to the first 4 hours after birth. A cognitive and behavioral testing program was begun under blind conditions when each animal reached 8 months of age. None of the measures of cognitive abilities or behavior distinguished experimental animals with 6.5 hours of hypoglycemia from controls. Ten hours of hypoglycemia resulted in motivational and adaptability problems that made it impossible for some animals to learn even the simplest tasks, but, when provided with additional attention and adequate motivation, these experimental animals performed as well as controls in tests designed to measure cognitive ability. We conclude that neonatal hypoglycemia of 10 hours duration results in adaptive difficulties in rhesus monkeys but, if special attention is devoted to these animals, there are no enduring cognitive or behavioral deficits.
30 citations