Nonpharmacological amelioration of age-related learning deficits: the impact of hippocampal theta-triggered training.

نویسندگان

  • Yukiko Asaka
  • Kristin N Mauldin
  • Amy L Griffin
  • Matthew A Seager
  • Elizabeth Shurell
  • Stephen D Berry
چکیده

Age-related learning deficits are often attributed to deterioration of hippocampal function. Conversely, a well studied index of hippocampal activity, the rhythm, is known to enhance hippocampal plasticity and accelerate learning rate in young subjects, suggesting that manipulations of activity might be used as a means to counteract impairments related to the aging process. Here, young and older rabbits were given eyeblink conditioning trials either when exhibiting hippocampal (+) or regardless of hippocampal activity (yoked control). Although, as expected, older-yoked control animals showed a learning deficit, the older + group learned as fast as young controls, demonstrating that aging deficits, at least in eyeblink classical conditioning, can be overcome by giving trials during episodes of hippocampal activity. The use of several learning criteria showed that the benefits of hippocampal occur in multiple phases of learning that may depend on different cognitive or motor processes. Whereas there was a benefit of -triggered training in both age groups during the early phase of acquisition, the enhancement persisted in older animals, peaking during later performance. These findings have implications for theories of age-related memory deficits and may contribute to the development of beneficial treatments.

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عنوان ژورنال:
  • Proceedings of the National Academy of Sciences of the United States of America

دوره 102 37  شماره 

صفحات  -

تاریخ انتشار 2005