Ultrasound image quality of the carpal tunnel during a pinch grip: effects of coupling media and wrist position

Balogh, Denise; Campbell, Michelle; Kociolek, Aaron M.

doi:10.1080/21681163.2024.2312171

Computer Methods in Biomechanics and Biomedical Engineering: Im

2024

DOI: 10.1080/21681163.2024.2312171

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Ultrasound image quality of the carpal tunnel during a pinch grip: effects of coupling media and wrist position

Denise Balogh,

Michelle Campbell,

Aaron M. Kociolek

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2024

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The Median Nerve Displays Adaptive Characteristics When Exposed to Repeated Pinch Grip Efforts of Varying Rates of Force Development

Balogh,

Kociolek

2024

J of Ultrasound Medicine

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ObjectivesRepeated gripping with high grip forces and high rates of grip force development are risk factors for carpal tunnel syndrome. As the nerve's adaptive ability is crucial to prevent disease progression, we investigated how these risk factors influence median nerve deformation and displacement over the time course of a repeated pinch grip task.MethodsSeventeen healthy participants performed a repeated grip task against a load cell while their carpal tunnel was scanned with ultrasound. The grip task involved pulp‐pinching three consecutive times from 0 to 40% maximal voluntary exertion (MVE), performed at three different rates of force development (RFD): 40% MVE/1 second; 2 seconds; and 5 seconds. Ultrasound images were analyzed at 10% MVE intervals. Nerve circularity, width, height, and cross‐sectional area were measured to assess deformation. Median nerve displacement was assessed by its change in position relative to the flexor digitorum superficialis tendon of the third digit (FD) in both radioulnar and palmodorsal axes.ResultsLinear mixed modeling indicated that median nerve deformation increased, becoming more circular, with each repeated pulp‐pinch (P < .01) and with grip force magnitude (P < .01). However, a faster RFD decreased nerve deformation (P < .01). Furthermore, the nerve displaced ulnarly during pulp‐pinching, with greater displacement during the fastest (ie, 40% MVE/1 second) RFD (P < .01).ConclusionsThe median nerve deformed and displaced in response to pulp‐pinching; however, faster rates of force development hindered this adaptive response. This likely reflects the viscoelastic properties of the healthy nerve and subsynovial connective tissue, highlighting the importance of tissue compliance in preventing nerve compression.

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The Median Nerve Displays Adaptive Characteristics When Exposed to Repeated Pinch Grip Efforts of Varying Rates of Force Development

Balogh,

Kociolek

2024

J of Ultrasound Medicine

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Ultrasound image quality of the carpal tunnel during a pinch grip: effects of coupling media and wrist position

Cited by 1 publication

References 31 publications

The Median Nerve Displays Adaptive Characteristics When Exposed to Repeated Pinch Grip Efforts of Varying Rates of Force Development

The Median Nerve Displays Adaptive Characteristics When Exposed to Repeated Pinch Grip Efforts of Varying Rates of Force Development

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