早期的视觉体验完善了视觉皮层区域内和视觉皮层区域内的视网膜组织
Carolin Heitmann1, Minye Zhan2, Madita Linke1
1Biological Psychology and Neuropsychology Lab, Faculty of Psychology and Movement Sciences, Universität Hamburg, Von-Melle-Park 11, 20146 Hamburg, Germany.
Current biology : CB
|November 2, 2023
概括
早期的视觉体验对于完善大脑的视觉地图至关重要. 没有它,视觉区域显示改变组织,影响视觉敏度.
科学领域:
- 神经科学是一个神经科学.
- 视觉感知 视觉感知 视觉感知
- 发育神经科学的发展神经科学.
背景情况:
- 早期的视觉区域表现出视网膜组织,人口受体场 (pRF) 大小和皮质放大因子 (CMF) 随着异常度和视觉层次而变化.
- 早期视觉体验对这种微小组织的影响仍然在很大程度上是未知的.
研究的目的:
- 研究早期视觉体验对早期视觉区域 (V1,V2,V3) 视网膜组织的影响.
- 评估pRF大小,异常效应和CMF在有先天性失明史的人群中.
主要方法:
- 使用7T功能磁共振成像 (fMRI) 进行pRF映射.
- 研究了8名患有先天性失明 (长达4年) 的个人,并将他们与有视力的对照人群进行了比较.
主要成果:
- 与对照组相比,视力恢复的个体表现出较大的骨pRF大小.
- 随着异常度和视觉区域 (V1-V3) 的 pRF 尺寸的增加,视力恢复个体中缺席.
- 皮层放大减小,并且从叶到叶位置的减少较小,与视力敏度相关.
结论:
- 早期的视觉体验对于完善人类视觉区域的天生的视网膜组织至关重要.
- 这种精细化过程对于开发完整的视觉能力和正常的视野表现至关重要.
相关概念视频
Vision
53.5K
Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
53.5K
Visual System
591
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
591
Anatomy of the Eyeball
7.1K
The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
7.1K
Motor and Sensory Areas of the Cortex
3.9K
The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
Motor Areas
The motor areas located in the frontal lobe are central to controlling voluntary movements. This region is further subdivided into the primary motor cortex and the premotor cortex....
3.9K
The Retina
69.1K
The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
69.1K
Association Areas of the Cortex
5.4K
Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
5.4K


