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Somatic Spinal Reflexes

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Related Experiment Video

Updated: Jun 11, 2026

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

Published on: March 3, 2018

Frataxin Expression in Sensory Neurons Is Required for Muscle Spindle Function and Proprioception.

Jürgen Schultheiß¹, Bridgette Watkins¹, Stephan Kröger¹

¹Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-Universität, Planegg-Martinsried, Germany.

|June 10, 2026

Summary

This summary is machine-generated.

Friedreich's Ataxia impairs muscle spindle function and proprioception, leading to motor deficits. Frataxin is crucial for sensory neuron function and maintaining normal muscle spindle activity.

Keywords:

CatWalk XT system Friedreich's ataxia gait analysis intrafusal fiber sensory neuron

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Measuring Neuromuscular Junction Functionality

Measuring Neuromuscular Junction Functionality

Published on: August 6, 2017

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Last Updated: Jun 11, 2026

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

A Simple Non-invasive Method for Temporary Knockdown of Upper Limb Proprioception

Published on: March 3, 2018

Measuring Neuromuscular Junction Functionality

Measuring Neuromuscular Junction Functionality

Published on: August 6, 2017

Area of Science:

Neuroscience
Genetics
Cell Biology

Background:

Friedreich's Ataxia (FA) results from reduced frataxin, impacting mitochondrial function.
FA is known to cause proprioception deficits, but muscle spindle involvement is unclear.

Purpose of the Study:

To investigate muscle spindle structure and function in a mouse model of FA.
To analyze the role of frataxin in proprioception and motor coordination.

Main Methods:

Studied motor coordination, muscle spindle function, and morphology in frataxin-deficient mice (FXN-Pvalb-cKO) at different ages.
Utilized gait analysis and electrophysiological recordings of proprioceptive afferents.

Main Results:

Late-stage mutant mice exhibited severe ataxia and coordination deficits.
Proprioceptive afferents showed reduced stretch sensitivity in mutant mice.
Muscle spindle structure remained largely intact, but sensory afferent terminals showed degeneration.

Conclusions:

Muscle spindle dysfunction contributes to motor deficits in FA.
Frataxin in sensory neurons is essential for proprioceptive acuity and muscle spindle function.
Dysfunctional muscle spindles may underlie motor coordination issues in FA patients.