摘要
利用细胞外记录，在乌拉坦麻醉和三碘季铵酚麻痹的３７只新西兰免上，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—４１ｍｓ，最大时程约２８ｍｓ。撤除电刺激３ｍｉｎ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。上述结果表明．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。
With the aim of study of the effect of stimulating amygdaloid body (basal) on theresponsive characteristics of the receptive field (RF) of on-response LGB neurons, elec trophysiological experiments were performed on 37 New Zealand rabbits anaethetizedwith urethane and immobilized by flaxedil. of the 117 recorded neuronsg 47 showedchanges in inresponse to light stimulation (facilitation or inhibition) and/or changes inRF configuration, although stimulation of amygdaloid body alone resulted in no visiblechange of the neuronal activities. The above results suggested that amygdaloid maymodulate ascending visual information proccessing at thalami level by changing variouscombinations of the response characteristics of the on-response LGB neurons.
出处
《生理学报》
CAS
CSCD
北大核心
1996年第5期487-492,共6页
Acta Physiologica Sinica
基金
国家自然科学基金
国家教委博士点基金
关键词
杏仁核
外膝体
神经元感受野
刺激
amygdaloid body
LGB
modulation
visual information processing
rabbit
