NDLI: Properties of tactile responses of neurons in rat thalamic ventroposterolateral nucleus

Content Provider	Springer Nature Link
Author	Bai, Jing Wang, De Heng Yin, Liang An, Shu Ming Zhou, Shao Ci Cao, Xiao Hua
Copyright Year	2007
Abstract	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.Unit responses were recorded extracellularly from thalamic ventroposterolateral nucleus in anesthetized rats.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.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.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。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。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。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。
Starting Page	300
Ending Page	306
Page Count	7
File Format	PDF
ISSN	16737067
Journal	Neuroscience Bulletin
Volume Number	23
Issue Number	5
e-ISSN	19958218
Language	Chinese
Publisher	Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences
Publisher Date	2008-02-07
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	thalamus ventroposterolateral nucleus tactile response receptive field convergence Pain Medicine Neurology Anatomy Anesthesiology Human Physiology Neurosciences
Content Type	Text
Resource Type	Article
Subject	Neuroscience Physiology Medicine

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