The crural interosseous membrane re-visited: a histological and microscopic study

  • Joseph Morley University of Bridgeport School of Chiropractic, Bridgeport, CT, United States.
  • Chenglei Fan Department of Neurosciences, Institute of Human Anatomy, University of Padova, Padova, Italy.
  • Kena McDermott University of Bridgeport School of Chiropractic, Bridgeport, CT, United States.
  • Caterina Fede Department of Neurosciences, Institute of Human Anatomy, University of Padova, Padova, Italy.
  • Emmett Hughes University of Bridgeport School of Chiropractic, Bridgeport, CT, United States.
  • Carla Stecco | carla.stecco@unipd.it Department of Neurosciences, Institute of Human Anatomy, University of Padova, Padova, Italy.

Abstract

The aim of this study was to characterize the microscopic structure and sensory nerve endings of the crural interosseous membrane (IM). 13 IMs from 7 cadavers were used to analyze the organization of the collagen fibers, IM’s thickness, distribution of elastic fibers and nerve elements. The IM is mainly a two-layer collagen fascicle structure with the collagen fibers of adjacent layers orientated along different directions, forming angles of 30.5 +/- 1.7° at proximal and 26.6 +/- 2.1° at distal part (P>0.05). The percentage of elastic fibers between the two layers and inside the collagen fascicle layer is 10.1 +/- 0.5% and 2.2 +/- 0.1% (P<0.001). The IM’s thickness at proximal, middle, and distal parts is 268.5 +/- 18.6μm; 293.2 +/- 12.5μm; 365.3 +/- 19.3 μm, respectively (Proximal vs Distal: P<0.001; Middle vs Distal: P<0.05). Nerve elements were present and located both inside and on the surface of the IM, whereas the mechanoreceptors are mainly located on the surface of the IM. Free nerve endings (33.3 +/- 5.0/cm2) and Ruffini corpuscles (3.4 +/- 0.6/cm2) were the predominant sensory elements, while Pacinian corpuscles (1.3 +/- 0.7/cm2) were rarely found. The type of mechanoreceptors found suggests that the IM may play a role in proprioception.

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Published
2019-08-09
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Section
Muscle Fascia - Original Articles
Keywords:
crural interosseous membrane, sensory nerve ending, mechanoreceptor
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How to Cite
Morley, J., Fan, C., McDermott, K., Fede, C., Hughes, E., & Stecco, C. (2019). The crural interosseous membrane re-visited: a histological and microscopic study. European Journal of Translational Myology, 29(3). https://doi.org/10.4081/ejtm.2019.8340