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刺激家兔杏仁基底核对外膝体“ON" 神经元感受野反应特性的影响

孙坚原, 付崇罗, 周绍慈

(华东师范大学生物系脑功能研究室，上海200062 ；聊城师范学院生物系，聊城252059)

摘要

利用细胞外记录，在乌拉坦麻醉和三碘季按酚麻痹的37只新西兰兔上，考察刺激杏仁基底核对外膝体神经元感受野反应特性的影响。实验观察到，在117个具有‘`ON”反应外膝体神经元中，47个单位在电刺激杏仁基底核时不同程度地受到抑制或易化性影响，即细胞反应强度和/或感受野范围均有改变。产生这些影响的潜伏期为7-41 ms，最大时程约28 ms。撤除电刺激3 min后，感受野反应特性即告恢复。单独刺激杏仁核不能引起外膝体单位放电。_l;述结果表明。杏仁核在调制外膝体神经元上传信息包括亮度、反差和分辨率等方面可能起到若干作用。

关键词： 杏仁核; 外膝体; 调制; 视觉信息处理; 兔

EFFECT OF AMYGDALOID STIMULATION ON RECEPTIVE FIELD OF“ON ” LGB NEURONS IN RABBIT

SUN JIAN-YUAN, FU CHONG-LUO, ZHOU SHAO-Cl

(Department of Biology, East China Normal University, Shanghai 200062；Department of Biology, Liaocheng Teachers College，Liaocheng 252059)

Abstract

With the aim of study of the effect of stimulating amygdaloid body (basal) on the responsive characteristics of the receptive field (RF) of on-response LGB neurons，electrophysiological experiments were performed on 37 New Zealand rabbits anaethetized with urethane and immobilized by flaxedil. Of the 117 recorded neurons，4 7 showed changes in inresponse to light stimulation (facilitation or inhibition) and/or changes in RF configuration，although stimulation of amygdaloid body alone resulted in no visible change of the neuronal activities. The above results suggested that amygdaloid may
modulate ascending visual information proccessing at thalami level by changing various combinations of the response characteristics of the on-response LGB neurons.

Key words: amygdaloid body;LGB;modulation;visual information processing;rabbit

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引用本文：

孙坚原, 付崇罗, 周绍慈. 刺激家兔杏仁基底核对外膝体“ON" 神经元感受野反应特性的影响[J]. 生理学报 1996; 48 (5): .

SUN JIAN-YUAN, FU CHONG-LUO, ZHOU SHAO-Cl. EFFECT OF AMYGDALOID STIMULATION ON RECEPTIVE FIELD OF“ON ” LGB NEURONS IN RABBIT. Acta Physiol Sin 1996; 48 (5): (in Chinese with English abstract).