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相关概念视频

Feedback Inhibition00:46

Feedback Inhibition

Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
Motor Unit Stimulation01:20

Motor Unit Stimulation

When the neuron of a motor unit fires an action potential, it triggers a series of events, leading to a twitch contraction in the muscle fibers. The process of excitation-contraction coupling is crucial in relaying the action potential to the muscle fibers.
The latent period of contraction marks the onset of excitation-contraction coupling, when the action potential propagates across the sarcolemma, preparing the muscle fibers for contraction. As the fibers enter the contraction phase, the...
Open and closed-loop control systems01:17

Open and closed-loop control systems

Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal and...
Feedback control systems01:26

Feedback control systems

Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...
Root-Locus Method01:19

Root-Locus Method

A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
This system can be represented by a block diagram,...

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A Protocol for Comprehensive Assessment of Bulbar Dysfunction in Amyotrophic Lateral Sclerosis ALS
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语音诱导方法用于测量关节控制.

Claudia I Abbiati1, Kimberly R Bauerly1, Shelley L Velleman1

  • 1Department of Communication Sciences and Disorders, University of Vermont, Burlington.

Journal of speech, language, and hearing research : JSLHR
|October 23, 2023
PubMed
概括

诱导方法显著影响时空指数 (STI) 值. 伪随机重复比连续重复产生更高的唇孔STI (LA STI),突出了对标准化语音运动控制研究方法的需求.

科学领域:

  • 语音语言病理学 语言病理学
  • 运动控制研究研究
  • 声学语音学的声音学.

背景情况:

  • 时空指数 (STI) 量化了语音运动控制中的关节变异性.
  • 在研究中不一致的诱导方法使STI解释变得复杂.
  • 为了可靠的STI测量,需要标准化.

研究的目的:

  • 调查不同诱导方法对STI值的影响.
  • 要确定重复类型是否影响唇孔STI (LA STI).
  • 评估刺激呈现类型对LA STI的影响.

主要方法:

  • 唇孔STI (LA STI) 计算为19名年轻成年人.
  • 使用2x2设计引起的制作:连续与伪随机重复以及听觉与听觉/视觉刺激.
  • 在参与者之间进行反平衡条件订单.

主要成果:

  • 重复类型显著影响了LA STI (p < .001).
  • 伪随机的重复产生了比连续的重复更高的平均LA STI.
  • 刺激呈现类型 (听觉与听觉/视觉) 并没有显著影响LA STI.

结论:

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  • 诱导方法,特别是重复类型,显著影响LA STI.
  • 研究人员在测量LA STI时必须考虑这些方法效应.
  • 标准化的协议对于一致和可比的语音运动控制研究至关重要.