在开发眼运动指令时表示感知决策
1Department of Physiology and Biophysics, and Regional Primate Research Center, University of Washington, Seattle 98195-7290, USA.
Nature
|April 4, 2000
概括
大脑比较感官证据来做出决定. 前视野 (FEF) 中的神经回路在视觉区分任务中显示出这种累积的证据,将决策和运动准备联系起来.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 系统神经科学 系统神经科学
背景情况:
- 行为决策依赖于对时间变化的感官信息的分类判断.
- 决策的证据比较背后的神经机制在很大程度上是未知的.
研究的目的:
- 为了研究大脑如何在视觉歧视任务中比较积累的感官证据.
- 确定参与运动准备的神经回路是否反映了正在进行的证据积累.
主要方法:
- 子执行了使用动态随机点运动刺激的方向判断任务.
- 用前眼场 (FEF) 的电微刺激来探测神经活动.
- 分析了眼动反应 (眼动),以评估微刺激的影响.
主要成果:
- 唤起的眼睛运动偏离了子的感知判断方向.
- 偏差的大小与运动强度和观看时间相关.
- 在FEF中的眼运动信号反映了累积的运动证据,告知了选择.
结论:
- 对于这个任务,决策形成和运动准备在FEF中共享神经组织层次.
- 产生行为反应的神经回路表现出积累的感官证据.
- 这为感知决策和行动计划的神经基础提供了洞察力.
相关概念视频
Vision
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.
Muscles of the Eye
The muscles of the eye are sophisticated structures that control eye movement and focus, allowing for the precise and rapid adjustments necessary for vision. The human eye is controlled by ten muscles — six extraocular muscles, three intraocular muscles, and one primary eyelid retractor muscle.
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Extraocular Muscles
The six extraocular muscles surround the eyeball and control its movements. They are responsible for a wide range of eye motions, including looking up, down, left, right, and rotating...
Motor and Sensory Areas of the Cortex
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.
Hierarchy of Motor Control
The hierarchy of motor control refers to the different levels of organization and processing involved in controlling movement in the body. These levels range from higher cortical areas involved in planning and decision-making to lower spinal cord reflexes that respond automatically to external stimuli.
Accessory Structures of the Eye
Optical perception, or vision, is an extraordinary sense dependent on converting light signals received via the ocular organs. These organs, known as eyes, are securely positioned within the bony cavities of the skull, called orbits. The orbits serve a dual purpose: a protective shield for the ocular globes and a stable attachment point for the soft ocular tissues. The eye's external protective mechanisms include the eyelids, which are edged with lashes that act as a barrier against foreign...
Depth Perception and Spatial Vision
Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.


