Mosquitoes
نویسندگان
چکیده
activity during sleep. Interestingly, the pattern of firing observed is specific to the song heard, suggesting that the neuronal activity carries with it information about the song itself. However, the quality of the juvenile’s song actually worsens after sleep, and improves only with practice the next day. Importantly, this effect is dependent upon sleep per se, as it is observed following daytime naps as well. The sleep-dependent deterioration of song quality seems detrimental at first glance; however, those birds whose song deteriorates the most during sleep ultimately reproduce the tutor’s song best, indicating that this is an adaptive sleep process. SWS and REM sleep must serve a purpose beyond developmental processes, however, as they persist into adulthood in both birds and mammals. The observation that SWS is more intense following brain use during wakefulness suggests that SWS serves a use-dependent neurophysiological role; however, the precise nature of this role is debated, with ideas ranging from restoring cellular resources depleted during wakefulness to weakening or strengthening synapses. The purpose of REM sleep in adults remains even more mysterious, as the suppression of REM sleep with anti-depressant drugs does not appear to impair performance in humans, and may even improve performance on motor memory tasks. Nevertheless, the abundance of REM sleep in neonates and its persistence throughout life suggests that REM sleep most likely serves processes prevalent in neonates that are needed less in adults. Ultimately, by determining the reason for the convergent evolution of SWS and REM sleep in birds and mammals, we may provide insight into the purpose of these states in ourselves.
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ورودعنوان ژورنال:
- Current Biology
دوره 24 شماره
صفحات -
تاریخ انتشار 2014