Nerve strain correlates with structural changes quantified by Fourier analysis.

Muscle Nerve

Fischell Department of Bioengineering, University of Maryland, College Park, Maryland, USA.

Published: September 2013

Introduction: Nerve deformation affects physiological function. Bands of Fontana are an optical manifestation of axonal undulations and may provide a structural indicator of nerve strain.

Methods: We developed an automated Fourier-based image processing method to quantify the periodicity of bands of Fontana both in bright field images and in axonal undulations in immunolabeled longitudinal sections.

Results: We found a strong linear relationship between applied strain and the frequency of bands of Fontana in rat sciatic nerves (-0.0056 μm(-) ⋅%(-) , r2  = 0.829; P < 0.05). This relationship agreed with the observed trend between strain and axonal waviness, calculated from longitudinal sections of sciatic nerves immunolabeled against myelin basic protein.

Conclusions: This accurate and objective approach has potential to increase our understanding of structure-function relationships in the nervous system and to guide preservation and enhancement of neural function.

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http://dx.doi.org/10.1002/mus.23809DOI Listing

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