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Related Concept Videos

Tension Response at Adherens Junctions01:26

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The adherens junctions that anchor cells together are multi-protein complexes that dynamically adapt to mechanical stimuli such as tensile forces and shear stress. Mechanosensory proteins in these junctions can sense such mechanical stimuli and undergo a shift in their conformation, resulting in an altered function — a process called mechanotransduction.
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The nervous system consists of complex motor neuron circuits, including upper motor neurons originating from the cerebral cortex and lower motor neurons starting in the spinal cord, coordinating both voluntary and involuntary movements. Among these, somatic motor neurons activate skeletal muscles and are classified into alpha, beta, and gamma types. Alpha neurons are vital for voluntary movement coordination, while gamma neurons adjust muscle spindle sensitivity, and the function of beta...
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The human brain processes information for decision-making using one of two routes: an intuitive system and a rational system (Epstein, 1994; popularized by Kahneman, 2011 as System 1 and System 2, respectively). The intuitive system is quick, impulsive, and operates with minimal effort, relying on emotions or habits to provide cues for what to do next, while the rational system is logical, analytical, deliberate, and methodical. Research in neuropsychology suggests that the...
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Neurons, the fundamental units of the brain and nervous system, communicate through complex electrochemical signals that underpin all cognitive and bodily functions. This communication is primarily facilitated by a process involving the generation and propagation of an action potential along the axon of the neuron. When the internal electrical charge of a neuron surpasses a certain threshold, an action potential is triggered. This rapid change in voltage travels swiftly along the axon to the...
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The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
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In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
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Proprioception and Tension Receptors in Crab Limbs: Student Laboratory Exercises
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Neurodynamics: is tension contentious?

Richard Ellis1,2, Giacomo Carta3,4,5, Ricardo J Andrade6,7

  • 1School of Clinical Sciences, Active Living and Rehabilitation: Aotearoa, Health and Rehabilitation Research Institute, Auckland University of Technology, Auckland, New Zealand.

The Journal of Manual & Manipulative Therapy
|November 16, 2021
PubMed
Summary
This summary is machine-generated.

Tensioning techniques are crucial for managing neuropathies, offering benefits like nerve repair and pain reduction. However, excessive tensile forces can harm the nervous system, necessitating a balanced therapeutic approach.

Keywords:
Neurodynamicscarpal tunnel syndromemononeuropathyneuropathic painpolyneuropathyradiculopathytensioning techniques

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Area of Science:

  • Neuroscience
  • Physiotherapy
  • Neurology

Background:

  • Tensioning techniques were the initial neurodynamic methods for neuropathy management.
  • Early approaches focused on a mechanical paradigm for neurodynamics.

Purpose of the Study:

  • To offer a balanced, evidence-informed perspective on optimal tensile loading for peripheral nerves.
  • To evaluate the therapeutic application of tensioning techniques.

Main Methods:

  • Review of in-vitro and ex-vivo research on tensile loading effects on neurons and nerves.
  • Analysis of animal and cellular models to understand excessive force impacts.

Main Results:

  • Optimal tensile loading promotes mechanical adaptation, neuronal differentiation, and nerve regeneration.
  • Eliminating tensile load can negatively impact the nervous system.
  • Excessive tensile forces can exacerbate clinical symptoms in patients.

Conclusions:

  • Tensile loading and tensioning techniques yield neuroimmune, neurophysiological, and neurochemical benefits.
  • A balanced application of tensioning techniques is vital, considering both optimal and excessive force effects.
  • Understanding the delicate nature of the nervous system is key for effective therapeutic interventions.