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Related Concept Videos

Muscle Coordination and Action01:24

Muscle Coordination and Action

Muscle coordination is a complex and finely tuned process essential for smooth and purposeful movements like flexion, extension, adduction, abduction, and rotation. The human body orchestrates the actions of various muscles working in concert, each with a specific role. Four functional types describe how muscles work together: agonist, antagonist, synergist, and fixator.
Agonists
Agonist muscles, often called prime movers, are the primary muscles responsible for producing a specific movement.
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...
Motor Units01:13

Motor Units

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...
Motor Units00:46

Motor Units

A motor unit consists of two main components: a single efferent motor neuron (i.e., a neuron that carries impulses away from the central nervous system) and all of the muscle fibers it innervates. The motor neuron may innervate multiple muscle fibers, which are single cells, but only one motor neuron innervates a single muscle fiber.
Multimachine Stability01:25

Multimachine Stability

Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
Hierarchy of Motor Control01:18

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.

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Related Experiment Video

Updated: May 27, 2026

Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients
05:23

Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients

Published on: March 11, 2021

Motor abundance supports multitasking while standing.

Wei-Li Hsu1, John P Scholz

  • 1School & Graduate Institute of Physical Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.

Human Movement Science
|November 19, 2011
PubMed
Summary
This summary is machine-generated.

The nervous system uses motor redundancy to manage multitasking, coordinating joints to maintain balance during complex tasks. This flexible control strategy improves with added tasks, preventing instability.

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A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation
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A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation

Published on: April 12, 2016

Related Experiment Videos

Last Updated: May 27, 2026

Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients
05:23

Motor Dual-Tasks for Gait Analysis and Evaluation in Post-Stroke Patients

Published on: March 11, 2021

A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation
11:06

A Human-machine-interface Integrating Low-cost Sensors with a Neuromuscular Electrical Stimulation System for Post-stroke Balance Rehabilitation

Published on: April 12, 2016

Area of Science:

  • Neuroscience
  • Biomechanics
  • Motor Control

Background:

  • Multitasking requires simultaneous execution of multiple activities.
  • Motor redundancy is hypothesized to facilitate multitasking by minimizing inter-task interference.
  • Postural stability is crucial for many daily activities.

Purpose of the Study:

  • To investigate how performing two supra-postural tasks affects postural stability.
  • To examine the role of motor redundancy in concurrent task performance.
  • To determine the impact of task complexity and addition on joint coordination strategies.

Main Methods:

  • Utilized the Uncontrolled Manifold (UCM) approach to analyze joint configuration variance (JCV).
  • Quantified the variance components stabilizing the center of mass (CoM) position (V(UCM)) and leading to CoM variability (V(ORT)).
  • Subjects performed a targeting task alone and concurrently with a ball-balancing task.

Main Results:

  • Joint coordination primarily utilized V(UCM), maintaining CoM position stability.
  • Adding a ball-balancing task or increasing targeting difficulty enhanced flexible control (V(UCM)) without increasing CoM variability (V(ORT)).
  • Increased joint variance during multitasking did not adversely affect CoM position stability.

Conclusions:

  • The nervous system leverages motor redundancy for effective multitasking.
  • Flexible joint coordination strategies are employed to maintain postural stability during concurrent tasks.
  • This motor control scheme demonstrates adaptability to increased task demands and complexity.