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相关概念视频

Somatosensation01:33

Somatosensation

37.0K
The somatosensory system relays sensory information from the skin, mucous membranes, limbs, and joints. Somatosensation is more familiarly known as the sense of touch. A typical somatosensory pathway includes three types of long neurons: primary, secondary, and tertiary. Primary neurons have cell bodies located near the spinal cord in groups of neurons called dorsal root ganglia. The sensory neurons of ganglia innervate designated areas of skin called dermatomes.
37.0K
Motor and Sensory Areas of the Cortex01:14

Motor and Sensory Areas of the Cortex

8.1K
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....
8.1K
Overview of Somatic Sensory Pathways01:29

Overview of Somatic Sensory Pathways

9.9K
Somatic sensory or somatosensory pathways refer to the neural pathways that carry information related to touch, pressure, pain, temperature, and proprioception from the skin, muscles, tendons, and joints to the brain. These pathways involve several stages of processing and integration of sensory information.
The somatosensory system is divided into three main pathways: the dorsal (or posterior) column-medial lemniscus, spinothalamic (or anterolateral), and spinocerebellar pathways.
The dorsal...
9.9K
Major Somatic Sensory Pathways01:28

Major Somatic Sensory Pathways

3.2K
Sensory impulses related to touch, pressure, vibration, and proprioception from various body parts, such as the limbs, trunk, neck, and posterior head, travel to the cerebral cortex through the posterior column-medial lemniscus pathway. The pathway’s name derives from the two white-matter tracts that convey the impulses: the spinal cord's posterior column and the brainstem's medial lemniscus. First-order sensory neurons extend their axons into the spinal cord, forming the...
3.2K
Hierarchy of Motor Control01:18

Hierarchy of Motor Control

5.6K
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.
5.6K
Introduction to Special Senses01:26

Introduction to Special Senses

6.8K
Sensory receptors play an integral part in comprehending our external and internal environments. They receive diverse stimuli, converting them into the nervous system's electrochemical signals. This conversion occurs as the stimulus alters the sensory neuron's cell membrane potential, instigating the generation of an action potential. This action potential is subsequently transmitted to the central nervous system (CNS), which integrates with other sensory data or higher cognitive...
6.8K

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相关实验视频

Updated: May 5, 2026

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
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A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

Published on: August 2, 2016

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运动变化的感觉源.

Leslie C Osborne1, Stephen G Lisberger, William Bialek

  • 1Sloan-Swartz Center for Theoretical Neurobiology, W. M. Keck Foundation Center for Integrative Neuroscience, Department of Physiology, University of California at San Francisco, San Francisco, California 94143-0444, USA. osborne@phy.ucsf.edu

Nature
|September 16, 2005
PubMed
概括
此摘要是机器生成的。

运动变化源于感官估计错误,而不是电机噪音或意图波动. 最佳的性能依赖于精确的感官输入,以获得精确的运动输出,正如灵长类动物的眼睛运动所示.

更多相关视频

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
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The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

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Author Spotlight: Combined Peripheral Nerve Stimulation and Controllable Pulse Parameter Transcranial Magnetic Stimulation to Probe Sensorimotor Control and Learning
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Author Spotlight: Combined Peripheral Nerve Stimulation and Controllable Pulse Parameter Transcranial Magnetic Stimulation to Probe Sensorimotor Control and Learning

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相关实验视频

Last Updated: May 5, 2026

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
07:28

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli

Published on: August 2, 2016

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The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task
10:39

The "Motor" in Implicit Motor Sequence Learning: A Foot-stepping Serial Reaction Time Task

Published on: May 3, 2018

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Author Spotlight: Combined Peripheral Nerve Stimulation and Controllable Pulse Parameter Transcranial Magnetic Stimulation to Probe Sensorimotor Control and Learning
14:47

Author Spotlight: Combined Peripheral Nerve Stimulation and Controllable Pulse Parameter Transcranial Magnetic Stimulation to Probe Sensorimotor Control and Learning

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科学领域:

  • 神经科学是一个神经科学.
  • 发动机控制器的控制器
  • 感官感知是一种感官感知.

背景情况:

  • 运动变化通常归因于运动系统或认知过程中的内部噪声.
  • 一个替代假设表明,变化源于对外部参数的感官估计中的不准确性,这些参数对于行动至关重要.
  • 了解变化的来源是优化电机性能的关键,特别是在要求精度的任务中.

研究的目的:

  • 调查感官估计错误是否是视觉引导光滑追逐眼动变异的主要原因.
  • 为了测试这种假设,即电机输出精度受到传感输入质量的限制,在规划和执行过程中没有额外的噪音.
  • 将推断的感觉错误的大小与感知歧视值进行比较.

主要方法:

  • 作为实验模型,利用了灵长类动物的视觉引导的光滑追踪眼动.
  • 重复呈现相同的目标运动,以分析眼睛轨迹的变化.
  • 量化了眼睛运动的差异,并将其归因于特定的感觉估计错误 (速度,方向,时间) 和背景噪音.

主要成果:

  • 眼睛轨迹差异的近92%是由对目标运动参数 (速度,方向,时间) 的感觉估计错误解释的.
  • 在眼睛运动和固定过程中观察到少量背景噪音.
  • 感官错误的估计大小与已建立的感官区分值相关.

结论:

  • 感官估计错误,而不是机动系统噪声或意图变化,是此任务中运动变化的主要来源.
  • 当它准确地反映感官信息的质量时,电机系统的性能就会得到优化.
  • 感知和行动背后的神经过程具有共同的噪声限制,这表明综合感官运动处理.