Send to

Choose Destination
Behav Neurosci. 1990 Dec;104(6):876-84.

Visual discrimination and reversal learning in the aged monkey (Macaca mulatta).

Author information

Salk Institute for Biological Studies, San Diego, California 92138.


Visual discrimination and reversal learning were assessed in young adult (10-12 years old, n = 4) and aged (23-27 years old, n = 5) female rhesus monkeys. Performance was comparable across age groups in many tasks, suggesting that the acquisition of stimulus-reward associations remains largely intact in the aged monkey. Most older subjects, however, required more training than any young animal to learn an initial pattern discrimination. In combination with previous findings from the same groups of monkeys, these data suggest that deficits in attending to the relevant stimulus features in novel testing procedures may contribute to poor performance in aged subjects across a variety of learning and memory tasks. In addition, preliminary findings from a discrimination probe procedure raise the possibility that aged subjects may adopt alternate testing strategies that compensate for some aspects of age-dependent cognitive dysfunction.

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for American Psychological Association
Loading ...
Support Center