阅读指令导致类别选择性视觉皮层的变化
Jason D Yeatman1, Daniel R McCloy2, Sendy Caffarra3
1Graduate School of Education, Stanford University, Stanford, CA, USA; Division of Developmental Behavioral Pediatrics, Stanford University School of Medicine, Stanford, CA, USA; Department of Psychology, Stanford University, Stanford, CA, USA.
Brain research bulletin
|April 27, 2024
概括
学习快速阅读会改变儿童视觉皮层的反应. 虽然视觉文字形式区域 (VWFA) 显示对单词的反应增加,但这不会对面部或对象的处理产生负面影响.
科学领域:
- 认知神经科学 认知神经科学
- 发展心理学 发展心理学
- 教育的神经科学教育的神经科学
背景情况:
- 教育塑造了专门的神经回路,以培养阅读等技能,这对现代社会至关重要.
- "神经回收"假设认为,学习阅读可能会重新利用大脑区域,可能以牺牲处理其他视觉刺激,如面孔和物体为代价.
- 了解早期识字对视觉皮层组织的影响是必不可少的.
研究的目的:
- 调查学习阅读是否会改变视觉皮层的反应,特别是腹腔皮皮层 (VOTC).
- 测试阅读获取增强单词响应,同时减少对面孔和物体的响应的预测.
- 检查在学龄前儿童早期识字教学引起的变化.
主要方法:
- 一项随机对照试验,涉及五岁儿童,他们被分配到阅读或口语干预计划中.
- 干预前后收集的磁脑电图 (MEG) 数据用于测量大脑活动.
- 在类别选择性视觉皮层区域内对文本,面孔和对象图像的视觉反应的分析.
主要成果:
- 阅读与口语语言教学相比,在类别选择性视觉皮层区域中引起了明显的变化.
- 在大脑对文字的反应与对其他视觉类别的反应之间没有明显的权衡.
- 在视觉单词形式区域 (VWFA) 中,对文本,面孔和对象的相对反应发生了变化,但增加的单词反应与减少的面孔或对象反应无关.
结论:
- 早期的识字指导迅速改变了儿童的高层视觉皮层组织.
- 阅读技能的出现似乎不会以牺牲面部和物体处理为代价.
- 高层视觉皮层经历了显著的,快速的变化,因为孩子们开始正式的学校教育,并获得新的技能,如识字.
相关概念视频
01:24Vision
53.2K
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.
53.2K
01:14Motor and Sensory Areas of the Cortex
3.8K
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....
3.8K
01:26Visual System
579
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...
579
01:24Color Vision
564
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.
564
01:22Photoreceptors and Visual Pathways
6.0K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.0K
01:20Anatomy 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