Combined organizational and activational effects of short and long photoperiods on spatial and temporal memory in rats.

Journal Article (Journal Article)

The present study examined the effects of photoperiod on spatial and temporal memory in adult Sprague-Dawley rats that were conceived and reared in different day lengths, i.e., short day (SD-8:16 light/dark) and long day (LD-16:8 light/dark). Both male and female LD rats demonstrated increased spatial memory capacity as evidenced by a lower number of choices to criterion in a 12-arm radial maze task relative to the performance of SD rats. SD rats also demonstrated a distortion in the content of temporal memory as evidenced by a proportional rightward shift in the 20 and 60 s temporal criteria trained using the peak-interval procedure that is consistent with reduced cholinergic function. The conclusion is that both spatial and temporal memory are sensitive to photoperiod variation in laboratory rats in a manner similar to that previously observed for reproductive behaviour.

Full Text

Duke Authors

Cited Authors

  • MacDonald, CJ; Cheng, R-K; Williams, CL; Meck, WH

Published Date

  • February 2007

Published In

Volume / Issue

  • 74 / 2

Start / End Page

  • 226 - 233

PubMed ID

  • 16971053

Electronic International Standard Serial Number (EISSN)

  • 1872-8308

International Standard Serial Number (ISSN)

  • 0376-6357

Digital Object Identifier (DOI)

  • 10.1016/j.beproc.2006.08.001


  • eng