期刊
BEHAVIORAL NEUROSCIENCE
卷 119, 期 5, 页码 1277-1289出版社
AMER PSYCHOLOGICAL ASSOC
DOI: 10.1037/0735-7044.119.5.1277
关键词
rats; multiunit recordings; thalamocortical auditory system; slow-wave sleep; expression of associative plasticity across vigilance states
After fear conditioning to a tone, rats received nonawakening presentations of the tone alone during slow-wave sleep (SWS) episodes. Multiunit activity was recorded in the medial part of the medial geniculate (MGm) and in the primary auditory cortex (ACx). Although tone-evoked responses were increased in MGm and ACx during the 3 conditioning sessions, group data failed to show any significant changes during SWS. Nonetheless, the few recordings (5/29) that exhibited the strongest conditioned responses during wakefulness expressed enhanced responding during SWS. Compared with previous data obtained in MGm during paradoxical sleep, associative plastic changes were less easily expressed during SWS. These results are discussed with regard to functional changes that occur in the thalamocortical system across vigilance states.
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