Spontaneous firing in olfactory bulb neurons of Bufo bufo gargarizans in and after hibernation  

作　　者：Chuancheng Liang Shaokang Bian Xia Peng Liwen Wang 

机构地区：[1]College of Chemistry and Life Science, Shenyang Normal University, Shenyang 110034, Liaoning Province, China [2]Key Laboratory of Biological Evolution and Agricultural Ecology, Department of Education, Shenyang 110034, Liaoning Province, China [3]Experiment Center, Shenyang Normal University, Shenyang 110034, Liaoning Province, China

出　　处：《Neural Regeneration Research》2011年第11期865-869,共5页中国神经再生研究（英文版）

基　　金：Liaoning Provincial Department of Education-Funded Project, No. 20068040;the Experimental Center of Shenyang Normal University Foundation, No. 2008007

摘　　要：Microelectrode technique was used to record the spontaneous electrical activities of the neurons in olfactory bulb of the Bufo bufo gargarizans, both in hibernation and after hibemation. This study investigated the electrophysiological characteristics of amphibian olfactory bulb in the period of hibernation and after hibernation and its effects on the start of hibernation and spontaneous awakening. The research showed four forms of spontaneous firings： single spontaneous firing, burst spontaneous firing, irregular spontaneous firing and consecutive single spontaneous firing. The single spontaneous firing includes slow depolarized spontaneous firing and fast depolarized spontaneous firing, and the slow depolarized spontaneous firing occurs only during the hibernation period. In hibernation, the low amplitude and low frequency firing with a longer duration may be relevant to maintaining the tonicity of the central nervous system in toads that are in hibernation, and this kind of firing may also provide an excited basis for their arousal from hibernation. After hibernation, the amplitude and frequency of firing increase, but the firing duration gets shorter. This form of short-term firing, which may be a phenomenon of sensory neurons fast adapting, is one of the neuronal mechanisms for the arousal of hibernating animals.Microelectrode technique was used to record the spontaneous electrical activities of the neurons in olfactory bulb of the Bufo bufo gargarizans, both in hibernation and after hibemation. This study investigated the electrophysiological characteristics of amphibian olfactory bulb in the period of hibernation and after hibernation and its effects on the start of hibernation and spontaneous awakening. The research showed four forms of spontaneous firings： single spontaneous firing, burst spontaneous firing, irregular spontaneous firing and consecutive single spontaneous firing. The single spontaneous firing includes slow depolarized spontaneous firing and fast depolarized spontaneous firing, and the slow depolarized spontaneous firing occurs only during the hibernation period. In hibernation, the low amplitude and low frequency firing with a longer duration may be relevant to maintaining the tonicity of the central nervous system in toads that are in hibernation, and this kind of firing may also provide an excited basis for their arousal from hibernation. After hibernation, the amplitude and frequency of firing increase, but the firing duration gets shorter. This form of short-term firing, which may be a phenomenon of sensory neurons fast adapting, is one of the neuronal mechanisms for the arousal of hibernating animals.

关 键 词：HIBERNATION after hibernation olfactory bulb Bufo bufo gargarizans spontaneous firing neural regeneration 

分 类 号：Q954.671[生物学—动物学] Q424