剥夺和优先使用对早期视觉皮层和类别选择性视觉区域之间的功能连接的影响
Leland L Fleming1, Matthew K Defenderfer1, Pinar Demirayak1
1Department of Neurobiology, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama, USA.
Human brain mapping
|November 22, 2024
概括
由于黄斑变性导致的视力丧失会重塑大脑连接. 即使没有优先使用,幸免的外周视觉区域也显示出改变的连接,表明大脑的可塑性.
科学领域:
- 神经科学是一个神经科学.
- 视觉神经科学是一种神经科学.
- 大脑的可塑性 大脑的可塑性
背景情况:
- 人类的行为和大脑功能适应感官输入损失.
- 研究经常检查感官剥夺如何改变大脑功能.
- 人们对大脑在感官损失后重新分配连接以获得剩余输入的能力不太了解.
研究的目的:
- 为了调查大脑是否改变功能连接,以优先考虑中央视力丧失后剩余的感官输入.
- 在患有黄斑退行症的个体中检查感官皮质内在功能连接的可塑性.
主要方法:
- 休息状态功能磁共振成像 (fMRI) 在完全黑暗中使用.
- 该研究包括患有晚期黄斑变性和选择性视力丧失的个体.
- 分析了视觉区域和视网膜表征 (受损,优先使用和非优先使用的外围区域) 之间的功能连接.
主要成果:
- 皮层区域代表了幸存的外围视网膜,在内在的功能连接中表现出了可塑性.
- 这些被省略的边缘区域显示出更强的连接到区域MT (运动处理),无论优先使用.
- 这些发现表明,由于长期的中部视力丧失,视觉皮层中普遍存在影响.
结论:
- 大脑在中央视力丧失后,在视觉皮层内的功能连接中表现出可塑性.
- 节省的视觉表示适应它们的连接,即使不是优先使用.
- 这些结果凸显了视觉皮层在关键发育时期之外的变化能力.
关键词:
在FFA和FFA之间.在这个过程中,MTTMTTMV1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1 V1功能磁力共振成像 (fMRI) 是一种功能连接性的功能连接性损伤投射区是一个损伤投射区.斑点退化症 斑点退化症塑性的可塑性 塑性感官剥夺 感官剥夺视觉皮层 视觉皮层 视觉皮层更多相关视频
09:01A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance
Published on: May 7, 2014
10.1K
07:11Author Spotlight: Insights into Visual Cortex Research Through Wide-View fMRI Mapping
Published on: December 8, 2023
1.4K
相关概念视频
01:21Association Areas of the Cortex
5.1K
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,...
5.1K
01:14Motor and Sensory Areas of the Cortex
2.9K
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...
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...
2.9K