相关实验视频

Updated: Jul 12, 2025

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Investigating Object Representations in the Macaque Dorsal Visual Stream Using Single-unit Recordings

Published on: August 1, 2018

高密度记录显示了 V4 中的形状和纹理编码的稀疏集群 (但不是列)

Tomoyuki Namima^1,2, Erin Kempkes¹, Polina Zamarashkina¹

¹Department of Biological Structure and Washington National Primate Research Center, University of Washington, Seattle, WA 98195, USA.

bioRxiv : the preprint server for biology

|October 31, 2023

概括

V4 区域的神经元显示出有限的集群,用于跨层的形状和纹理调整. 功能组织不是柱状的,这表明粗规模的编码而不是细规模的特征相似性.

科学领域:

神经科学是一个神经科学.
视觉皮层研究视觉皮层研究
灵长类大脑研究研究

背景情况:

地区V4神经元对视觉形式和纹理具有选择性.
区域V4在其各层的功能组织在很大程度上是未知的.

研究的目的:

为了研究地区V4.4的形状和纹理调整的层状功能组织.
为了确定具有相似调特性的神经元是否在V4区域内聚集在一起.

主要方法:

在两个清醒的子身上使用了高密度的神经像素探针.
同时记录了来自数十个神经元在皮层层的形状和质地调整.

主要成果:

识别出具有相似形状和纹理调的神经元的零星集群 (~20%).
这些集群仅限于特定的层次,很少表现出柱状组织.
即使在强烈的神经驱动和对比不变的情况下,也观察到类似的调组织.

结论:

区域V4中的功能组织在形状和纹理特征上不是柱状的.
区域V4可能采用粗规模的组织 (例如,2D与3D形状),而不是细规模的特征相似性.
这种组织可能是各种输入的结果,从而创建高维的调分组.

更多相关视频

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Large-scale Reconstructions and Independent, Unbiased Clustering Based on Morphological Metrics to Classify Neurons in Selective Populations

Published on: February 15, 2017

Assessment of Dendritic Arborization in the Dentate Gyrus of the Hippocampal Region in Mice

Assessment of Dendritic Arborization in the Dentate Gyrus of the Hippocampal Region in Mice

Published on: March 31, 2015

相关概念视频

Shape and Texture of Coarse Aggregate

Shape and Texture of Coarse Aggregate

Aggregate shape is classified based on the relative sharpness or roundness of the edges and corners. This classification includes categories like rounded, angular, elongated, and flaky, each with specific characteristics. Rounded aggregates, fully shaped by attrition, are typical of river or seashore gravel, while angular aggregates, such as crushed rock, have well-defined edges. Aggregates that are elongated and flaky are less desirable, as they can reduce the workability and strength of...