Rat

Reinforcing properties of spontaneous activity in the rat

Required 21 male sprague-dawley rats to bar press on an ascending sequence of fixed-ratio requirements in order to run in either a voluntary treadmill or a braked running wheel. In both testing situations the duration of the burst of running...

Year Published: 1971Animal Type: Rat, Rodent

Citation: Collier, G. H., Hirsch, E. 1971. Reinforcing properties of spontaneous activity in the rat. Journal of Comparative and Physiological Psychology 77, 155-160.

Physiological responses to blood collection methods in rats

Plasma glucose levels are related to the length of handling time during blood collection.

Year Published: 1971Animal Type: Rat, Rodent

Citation: Besch, E. L., Chou, B. J. 1971. Physiological responses to blood collection methods in rats. Proceedings of the Society for Experimental Biology and Medicine 138, 1019-1021.

Circadian alteration of audiogenic seizure susceptibility in rats

Genetically determined audiogenic seizure susceptibility in Wistar albino rats showed distinct rhythmicity with its increase and decrease during night and day, respectively. This rhythmicity is apparently regulated by light since its trend can be readily reversed by artificially reversing the...

Year Published: 1970Animal Type: Rat, Rodent

Citation: Wada, J. A., Asakura, T. 1970. Circadian alteration of audiogenic seizure susceptibility in rats. Experimental Neurology 29, 211-214.

Nesting material as a reinforcer for operant behavior in the rat

Rats will readily work for the acquisition of nesting material. Paper strips serves as an adequate reinforcer. .. Prior to parturiation, only a small daily nest was built and barpressing occurred only in the dark part of the lighting cycle....

Year Published: 1970Animal Type: Rat, Rodent

Citation: Oley, N. N., Slotnick, B. M. 1970. Nesting material as a reinforcer for operant behavior in the rat. Psychonomic Science 21, 41-43.

Effects of environmental enrichment and impoverishment on rat cerebral cortex

The first part of this paper deals with rat brain anatomy as affected by variations of starting age and of duration of exposure to enriched (complex) or impoverished (restricted) environmental conditions. Cerebral cortical depth measurements and weights of brain samples...

Year Published: 1972Topics: Environmental EnrichmentAnimal Type: Rat, Rodent

Citation: Diamond, M. C., Rosenzweig, M. R., Bennett, E. L. et al. 1972. Effects of environmental enrichment and impoverishment on rat cerebral cortex. Journal of Neurobiology 3, 47-64.

Long-term isolation stress and its effects on drug response in rodents

This review of the literature has illustrated that isolation stress, especially long-term isolation stress in rats and mice, can affect the growth, behavior, physiological condition, and response to a wide variety of drugs. ... Isolation stress in mice produces abnormal...

Year Published: 1971Animal Type: Mouse, Rat, Rodent

Citation: Baer, H. 1971. Long-term isolation stress and its effects on drug response in rodents. Laboratory Animal Science 21, 341-349.

Chemical and anatomical plasticity of brain: Replication and extensions

Single-caged rats eat more than group-housed animals kept in enriched cages.

Year Published: 1972Animal Type: Rat, Rodent

Citation: Rosenzweig, M. R., Bennett, E. L., Diamond, M. C. 1972. Chemical and anatomical plasticity of brain: Replication and extensions. In: Macromolecules and Behavior (2nd Edition). Gaito, J. (ed), 205-278. Appleton-Century-Crofts, New York, NY.

The effects of cage environment upon avoidance responding in aged rats

The beneficial effects of environmental enrichment are not restricted to a brief cricial period in development. Positive effects occur also in rats aged 300 days when first placed in an enriched environment.

Year Published: 1972Topics: Environmental EnrichmentAnimal Type: Rat, Rodent

Citation: Doty, B. A. 1972. The effects of cage environment upon avoidance responding in aged rats. Journal of Gerontology 27, 358-360.

Sleep patterns related to rearing rats in enriched and impoverished environments

Rats housed in groups in large, enriched versus alone in small, barren cages show brain changes indicative of enhanced cerebral activity.Single-caged rats consumed more pieces of food than their enriched littermates.

Year Published: 1973Animal Type: Rat, Rodent

Citation: Tagney, J. 1973. Sleep patterns related to rearing rats in enriched and impoverished environments. Brain Research 53, 353-361.

The preference of rats for free or response-produced food

The majority [but not all] of rats preferred freely available food over food that could be obtained only via lever pressing.

Year Published: 1973Animal Type: Rat, Rodent

Citation: Hothersall, D., Huey, D., Thatcher, K. 1973. The preference of rats for free or response-produced food. Animal Learning and Behavior, 241-243.