CAJ | 학술논문

目的为确定大鼠丘脑腹后外侧核是否也发生触觉信息的会聚,本文研究了大鼠丘脑腹后外侧核神经元触觉反应的特性.方法采用在体细胞外单位放电记录技术,记录麻醉状态下大鼠丘脑腹后外侧核触觉神经元的放电活动.结果在记录的156个神经元中,140个神经元(89.7%)具有单一、连续的小感受野,16个神经元(10.3%)具有两个不连续的感受野.部分神经元对作用于感受野不同部位的相同触觉刺激产生不同的放电形式.此外,还观察到4.5%触觉神经元(n=7),它们仅对感受野内的运动性触觉刺激敏感,而对点状触觉刺激不敏感.结论以上结果表明,在大鼠丘脑腹后外侧核,大多数神经元具有皮肤感受器的时空和模式特性,而少数神经元表现出不同外周感受器相互作用的反应.由此可见,大鼠丘脑腹后外侧核中存在触觉信息的会聚.
목적 위학정대서구뇌복후외측핵시부야발생촉각신식적회취,본문연구료대서구뇌복후외측핵신경원촉각반응적특성.방법 채용재체세포외단위방전기록기술,기록마취상태하대서구뇌복후외측핵촉각신경원적방전활동.결과 재기록적156개신경원중,140개신경원(89.7%)구유단일、련속적소감수야,16개신경원(10.3%)구유량개불련속적감수야.부분신경원대작용우감수야불동부위적상동촉각자격산생불동적방전형식.차외,환관찰도4.5%촉각신경원(n=7),타문부대감수야내적운동성촉각자격민감,이대점상촉각자격불민감.결론 이상결과표명,재대서구뇌복후외측핵,대다수신경원구유피부감수기적시공화모식특성,이소수신경원표현출불동외주감수기상호작용적반응.유차가견,대서구뇌복후외측핵중존재촉각신식적회취.
Objective To determine whether the convergences of tactile information also occur at thalamic ventroposterolateral nucleus in rats, we investigated the properties of tactile responses of the thalamic ventroposterolateral nucleus in rats. Methods Unit responses were recorded extracellularly from thalamic ventroposterolateral nucleus in anesthetized rats. Results Among 156 neurons examined, 140 neurons (89.7%) had the single, continual and small receptive fields, and 16 neurons (10.3%) had two discrete receptive fields. Some neurons exhibited different responses to the same intensity stimulation which delivered to different points in their receptive fields. In addition, 4.5% neurons (n = 7) responded only to locomotive stimulation but not to a punctiform tactile stimulation. Conclusion The majority of neurons in ventroposterolateral nucleus of rats have the spatial, temporal and submodal characteristics of cutaneous receptors, while the minority of neurons exhibit the responses of interaction of different peripheral receptors. Therefore, it is concluded that there are convergences of tactile information at the ventroposterolateral nucleus of rats.