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相关概念视频

Hierarchy of Motor Control01:18

Hierarchy of Motor Control

2.9K
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.
2.9K
Direct Motor Pathways01:11

Direct Motor Pathways

2.1K
The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
The corticospinal tract is responsible for the voluntary movement of the limbs and trunk. It originates in the cerebral cortex of the brain and descends through the cerebrum's internal capsule and...
2.1K
Piaget's Stage 1 of Cognitive Development01:14

Piaget's Stage 1 of Cognitive Development

664
The sensorimotor stage, the initial phase of Jean Piaget's theory of cognitive development, spans the first two years of a child's life. During this period, infants actively engage with their surroundings, building cognitive awareness through direct interaction with the world. This interaction is primarily based on sensory perception and motor actions, allowing infants to gradually understand basic physical properties and predict how objects interact within their environment.
664
Motor Units01:13

Motor Units

4.1K
The motor unit is a fundamental component of the neuromuscular system and plays a crucial role in coordinating muscle contractions. It consists of a somatic motor neuron, which connects and controls multiple skeletal muscle fibers, forming a single functional segment. The axon of the motor neuron branches out and establishes synaptic connections known as neuromuscular junctions with individual muscle fibers within the motor unit.
Motor units come in different sizes, with smaller units...
4.1K
Indirect Motor Pathways01:22

Indirect Motor Pathways

1.6K
The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
The vestibulospinal tract originates in the vestibular nuclei of the brainstem. The vestibular system detects changes in...
1.6K
Anatomical Movements00:51

Anatomical Movements

7.3K
Anatomical movements refer to the various actions or motions that can be performed by the body's joints and muscles. These movements are described using specific terms to provide a standardized way of discussing and understanding the range of motion at different joints.
Here are some common anatomical movements:
Flexion and extension motions are in the sagittal (anterior–posterior) plane of motion. These movements take place at the shoulder, hip, elbow, knee, wrist,...
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相关实验视频

Updated: Jul 20, 2025

Quantifying Learning in Young Infants: Tracking Leg Actions During a Discovery-learning Task
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在婴儿运动发育过程中从运动原始体产生变异性.

Elodie Hinnekens1,2, Marianne Barbu-Roth3, Manh-Cuong Do1,2

  • 1Université Paris-Saclay, CIAMS, Orsay, France.

eLife
|July 31, 2023
PubMed
概括
此摘要是机器生成的。

新生儿通过基本运动模式的可变激活来探索运动. 随着他们发展出更一致的步行肌肉激活,这种变异性会减少.

关键词:
人类 人类 人类 人类 人类 人类 人类婴儿时期的婴儿时期.发动机发动机的发展.这是模块化的模块化.动力原始体的原始体肌肉协同作用 肌肉协同作用神经科学 神经科学从一个试验到另一个试验的可变性.

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A Novel Experimental and Analytical Approach to the Multimodal Neural Decoding of Intent During Social Interaction in Freely-behaving Human Infants
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相关实验视频

Last Updated: Jul 20, 2025

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科学领域:

  • 发育神经科学的发展神经科学.
  • 发动机控制器 发动机控制器
  • 计算神经科学是一种计算神经科学.

背景情况:

  • 运动变性对于发育系统中的运动学习和探索至关重要.
  • 人类婴儿的腿部运动是基于基本的协调模式,称为运动原体.
  • 这些原始体的运动变异性出现和发展轨迹尚未得到充分理解.

研究的目的:

  • 研究人类发育早期,从出生到步行开始的运动变异性如何变化.
  • 确定运动原始和婴儿腿部运动试验对试验的变异性之间的关系.
  • 了解底层运动探索和学习的发育机制.

主要方法:

  • 对18名婴儿从出生 (~4天) 到步行 (~14个月) 的长度研究.
  • 在2-3个时间点的运动或节奏运动期间记录腿部肌肉活动.
  • 应用无监督机器学习来分析试验对试验的运动变异性结构.

主要成果:

  • 在早期发育过程中,运动变异性的结构发生显著变化.
  • 新生儿通过可变地激活一组最小的运动原始体来表现出最大的运动变性.
  • 幼儿表现出减少的变化与更一致的激活一个扩展的原始集的变化.

结论:

  • 人类新生儿利用基本运动原体的可变激活来进行早期的运动探索.
  • 运动发育涉及从早期激活的高可变性过渡到更常规的,分成的原始激活.
  • 这种发育转变是运动控制的精细化,导致独立行走的基础.