Sleep in the Rock Hyrax, Procavia capensis
Sleep in the Rock Hyrax, Procavia capensis
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DOI：
10.1159/000335342
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发表时间：
2012-01-01
影响因子：
1.7
通讯作者：
Manger, Paul R.
中科院分区：
文献类型：
--
作者：
Gravett, Nadine;Bhagwandin, Adhil;Manger, Paul R.
我们调查了岩獭的睡眠，Procavia capensis，一种群居哺乳动物，通常生活在非洲南部大部分地区的岩石露头上。野外捕获的5只成年岩狸在不受阻碍的情况下，通过信号遥测中继连续记录72小时的睡眠。除了清醒，慢波睡眠（SWS）和明确的快速眼动（REM）状态，一种被称为无睡眠状态（SI）的睡眠状态，其特征是低电压，高频脑电图，肌电图保持在与前SWS发作相同的振幅，心率基本正常。如果SI可以被认为是一种低压非快速眼动的形式，那么这意味着岩兔在迄今研究的所有陆生哺乳动物中显示出最低的快速眼动记录。相反，如果SI是快速眼动睡眠的一种形式，它将导致这种状态的一个新的细分分类；不过，还需要进一步调查。平均清醒时间15.89 h(66.2%)，睡眠时间6.02 h(25.1%)，睡眠时间43 min(3%)，快速眼动睡眠时间6 min(0.4%)，平均快速眼动睡眠时间小于6 min/d。在这些动物中最常见的状态转换通路是wake -> SWS -> wake。在光明期和黑暗期之间，所有状态的总睡眠时间、发作次数和发作持续时间没有显著差异。因此，在受控的实验室条件下，先前将岩狸分类为强昼夜性的似乎是不成立的。巴塞尔S. Karger股份有限公司版权所有
We investigated sleep in the rock hyrax, Procavia capensis, a social mammal that typically lives in colonies on rocky outcrops throughout most parts of Southern Africa. The sleep of 5 wild-captured, adult rock hyraxes was recorded continuously for 72 h using telemetric relay of signals and allowing unimpeded movement. In addition to waking, slow wave sleep (SWS) and an unambiguous rapid eye movement (REM) state, a sleep state termed somnus innominatus (SI), characterized by low-voltage, high-frequency electroencephalogram, an electromyogram that stayed at the same amplitude as the preceding SWS episode and a mostly regular heart rate, were identified. If SI can be considered a form of low-voltage non-REM, the implication would be that the rock hyrax exhibits the lowest amount of REM recorded for any terrestrial mammal studied to date. Conversely, if SI is a form of REM sleep, it would lead to the classification of a novel subdivision of this state; however, further investigation would be required. The hyraxes spent on average 15.89 h (66.2%) of the time awake, 6.02 h (25.1%) in SW5, 43 min (3%) in SI and 6 min (0.4%) in REM. The unambiguous REM sleep amounts were on average less than 6 min/day. The most common state transition pathway in these animals was found to be wake -> SWS -> wake. No significant differences were noted with regard to total sleep time, number of episodes and episode duration for all states between the light and dark periods. Thus, prior classification of the rock hyrax as strongly diurnal does not appear to hold under controlled laboratory conditions. Copyright (C) 2012 S. Karger AG, Basel