Visuotopic organisation of striate cortex in the marmoset monkey (Callithrix jacchus)
Visuotopic organisation of striate cortex in the marmoset monkey (Callithrix jacchus)
复制标题
狨猴（Callithrix jacchus）纹状皮层的视觉组织
DOI：
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
M. Rosa
中科院分区：
文献类型：
--
作者：
K. Fritsches;M. Rosa
用舒芬太尼/氧化亚氮麻醉和泮库溴铵麻痹成年雄性狨猴（Callithrix jacchus），通过细胞外记录研究了初级视觉皮层（V1）的视觉异位组织。对4个个体的枕区进行广泛采样，对另外5个个体的V1进行部分覆盖，不仅可以建立正常的视检，还可以研究个体间的变异性。与其他灵长类动物一样，V1有一个单一的、连续的对侧半视野图，视觉上象限代表腹侧，下象限代表背侧。在皮质表面的二维重建中测量到V1的表面积从192到217 mm2不等。对中央凹和旁中央凹视野的表征有明显的强调：视野中央5°的表征占V1表面积的36-39%，而中央10°的表征占57-59%。上下象限的表示之间没有明显的不对称。V1的视觉地形在个体之间高度一致，无论是相对于沟标志还是立体定位坐标。V1表示整个对侧半野；此外，在距离V1/V2边界小于800 μm的V1内，还观察到接受野边界侵入同侧半野的神经元。同侧半野的总侵犯在中央凹中心小于0.5°，但在垂直子午线周围达到8°。我们的研究结果表明，尽管不同物种在大小、生态位和出生后发育时间上存在重大差异，但新旧大陆猿类的V1组织是相似的。©1996 Wiley‐Liss, Inc。
The visuotopic organisation of the primary visual cortex (V1) was studied by extracellular recordings in adult male marmosets (Callithrix jacchus) that were anaesthetised with sufentanil/nitrous oxide and paralysed with pancuronium bromide. Extensive sampling of the occipital region in four individuals and partial coverage of V1 in five others allowed not only the establishment of the normal visuotopy but also the study of interindividual variability. As in other primates, there was a single, continuous map of the contralateral hemifield in V1, with the upper visual quadrant represented ventrally and the lower quadrant represented dorsally. The surface area of V1, which was measured in two‐dimensional reconstructions of the cortical surface, varied from 192 to 217 mm2. There was a marked emphasis on the representation of the foveal and parafoveal visual fields: the representation of the central 5° of the visual field occupied 36–39% of the surface area of V1, whereas the central 10° occupied 57–59%. No asymmetry between the representations of the upper and lower quadrants was apparent. The visual topography of V1 was highly consistent between individuals, relative to both sulcal landmarks and stereotaxic coordinates. The entire contralateral hemifield was represented in V1; in addition, neurones with receptive fields whose borders invaded the ipsilateral hemifield were observed within V1, less than 800 μm from the V1/V2 boundary. The total invasion of the ipsilateral hemifield was less than 0.5° at the centre of the fovea but reached 8° at the periphery of the vertical meridian. Our results demonstrate that the organisation of V1 is similar in diurnal New and Old World simians, despite major variations in size, ecological niche, and timing of postnatal development across species. © 1996 Wiley‐Liss, Inc.
影响因子：
2.5
作者：
GATTASS, R;GROSS, CG
通讯作者：
GROSS, CG