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幼猫单眼视剥夺和反缝过程中显示的双眼竞争机制

寿天德, 刘华, 薛晋堂

中国科学技术大学生物学系. 安徽,合肥(230026)

摘要

以光栅为刺激所同时产生的图形视觉诱发电位和图形视网膜电图为指标, 测定了单眼视剥夺和反缝的新生幼猫个体在发育不同阶段的空间频率调谐曲线, 并与同龄正常猫、成年正常猫进行了比较研究。图2参8

关键词： 视剥夺; 反缝; 视觉发育; 双眼竞争; 眼优势

Binocualar competitive mechanisms in the visual cortex in early developing kittens of monocular deprivation and reverse suture revealed by pattern visual evoked potential

Shou Tiande, Liu Hua, Xue Jintang

Department of Biology, University of Science and Technology of China. Hefei,Anhui

Abstract

Using conlract reversing square-wave gratings stimuli the Pcttern visual evoked potentials (P-VEP)and pattern electroretinograms (P-ERG) were simultaneously recorded to determine the spatial frequency tuning curves for kittens of monocular deprivation (from 8th to 12th postnatal week) and reverse suture(from 12th to 15th postnatal week), as compared with those of normal kittens of the same age and adult cats. The results showed than in the range from spatial frequency 0.12 to 1.5 c/d the amplitudes of P-VEP responses driven respectively by the left and the right eyes in normal kittens were similar but clearly smaller than those driven binocularly. For kittens with one eye deprived, the P-VEP amplitudes driven by the deprived eye decreased markedly. In contrast, the P-VEP amplitudes driven by the undeprived eye increased significantly, while the P-VEP amplitudes driven by simultaneous stimulation of both eyes were intermediate between the two monocular responses. For the reversely sutured kittens, the P-VEP amplitudes driven by the formally deprived eye recovered to some extent, while the P-VEP amplitudes driven by the reversely sutured eye decreased, and their amplitudes tended to.

Key words: Visual monocular deprivation;Reverse suture;Visual development;Binocular competition;Ocular dominance

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引用本文：

寿天德, 刘华, 薛晋堂. 幼猫单眼视剥夺和反缝过程中显示的双眼竞争机制[J]. 生理学报 1994; 46 (3): .

Shou Tiande, Liu Hua, Xue Jintang. Binocualar competitive mechanisms in the visual cortex in early developing kittens of monocular deprivation and reverse suture revealed by pattern visual evoked potential. Acta Physiol Sin 1994; 46 (3): (in Chinese with English abstract).