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相关概念视频

Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

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The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
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Muscle Recovery and Fatigue01:24

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Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
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Muscles that Move the Head01:19

Muscles that Move the Head

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The muscles that move the head are a dynamic and complex group of structures that work together to facilitate a wide range of head movements, including rotation, flexion, extension, and lateral bending.
The bilateral sternocleidomastoid, or SCM, and the suprahyoid and infrahyoid muscles are significant head flexors. The SCM muscles originate at the sternum and clavicle and attach to the mastoid process of the temporal bone. The SCM contracts bilaterally to bend the head forward, whereas...
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Equilibrium and Balance01:15

Equilibrium and Balance

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The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
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Relaxation of Skeletal Muscles01:29

Relaxation of Skeletal Muscles

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The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
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Chemical Synapses01:26

Chemical Synapses

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Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
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相关实验视频

Updated: May 29, 2025

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception
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部肌肉疲劳会破坏自我运动的感知.

F M Botti1, M Guardabassi1, A Ferraresi1

  • 1Department of Medicine and Surgery, Human Physiology Section, Università Degli Studi Di Perugia, Piazzale Gambuli 1, 06100, Perugia, Italy.

Experimental brain research
|February 1, 2025
PubMed
概括

部肌肉疲劳会通过降低运动跟踪的准确性来损害自我运动的感知,特别是在缓慢的旋转过程中. 这凸显了部自感觉在感知身体运动中的关键作用.

关键词:
宫自身感受是指宫自身感受.宫 - 垂体相互作用.动感是一种动感.肌肉疲劳导致肌肉疲劳.自动运动感知 自动运动感知

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科学领域:

  • 神经科学是一个神经科学.
  • 人类运动科学科学 人类运动科学
  • 垂体系统研究研究 垂体系统研究

背景情况:

  • 自动运动感知依赖于集成的感官输入,包括前体和自感信号.
  • 来自部肌肉的部自身感受,有助于空间定向和运动感知.
  • 部伸展肌肉疲劳是一种常见的疾病,可能会影响感觉运动整合.

研究的目的:

  • 为了研究部延伸肌肉疲劳对自我运动感知的影响.
  • 为了区分部自感觉与前置系统在因疲劳而改变的运动感知中的作用.
  • 为了检查部肌肉疲劳如何影响缓慢与快速身体旋转的处理.

主要方法:

  • 部伸展肌肉疲劳是通过长时间对抗抗力的同度收缩来诱导的.
  • 通过评估追踪被记住的视觉目标在被动的阴影形体旋转 (仅干和全身) 期间的准确性来评估自我运动感知.
  • 在诱导部肌肉疲劳之前和期间,对比了感知反应.

主要成果:

  • 部肌肉疲劳显著降低了自我运动的感知,证据显示,在车旋转过程中跟踪精度降低.
  • 这种效应在缓慢的旋转过程中是突出的,在快速的旋转过程中没有观察到显著的变化.
  • 疲劳不会改变在全身旋转期间的运动感知,仅仅激活前置系统.
  • 部肌肉疲劳取消了强力头偏差对感知反应的影响.

结论:

  • 部肌肉疲劳会损害自我运动感知,主要是通过影响自身感知系统信号缓慢的干部旋转的能力.
  • 这些发现强调了部自身感应对准确的自我运动感应的关键贡献,特别是在低频运动期间.
  • 疲劳引起的部亲感变化可能会扰乱用于空间定向的感官信息的整合.