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Theses

Biomecanique du segment tete-cou in vivo & aeronautique militaire. Approches neuromusculaire et morphologique

Abstract : The aims of this study were to 1) better understand the relative contribution of morphological (muscle CSA) and muscle activation (EMG) underlying the between-gender differences in neck torque ratios in healthy male and female non-pilots and also between neck pain and asymptomatic fighter pilots and 2) to examine the impact of helmet mounted display and gender on the neural activation patterns of neck muscles induced by simulated flight under acceleration with different head-neck configurations in non-pilots subjects and on the 3D kinematics of the head-neck segment of fighter pilots under normal gravity (lG). Non-pilot men displayed higher specific tension of neck flexors and neuromuscular efficiency compared with women, the latter exhibiting also higher levels of coactivation of antagonistic and stabilizer muscles. Neck pain pilots displayed lower specific tension of neck muscles during side-bending contractions likely related to neuromuscular and morphological differences of lateral neck muscle s such as the splenius capitis. The second part of the study revealed that muscles responses were different across gender; the women showing higher levels of muscle activity during sustained head-neck posture under Gz loading and particularly when helmet with mounted display was tested. In addition, 3D-kinematics analysis showed that neck pain pilots displayed lower coupled motions and lower joint position sense. Furthermore, during actual moderate flight, this type of helmet altered the strength of neck muscles even in asymptomatic pilot s. These findings underscore the potential higher risk of injury in women compared with men when helmet mounted display are used during flight and the need to improve the neck strength and CSA in women and/or weak pilots.
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https://pastel.archives-ouvertes.fr/pastel-00004773
Contributor : Ecole Arts Et Métiers Paristech <>
Submitted on : Friday, April 2, 2010 - 8:00:00 AM
Last modification on : Monday, October 19, 2020 - 11:04:02 AM
Long-term archiving on: : Friday, September 10, 2010 - 1:17:49 PM

Identifiers

  • HAL Id : pastel-00004773, version 1

Citation

Jennyfer Lecompte. Biomecanique du segment tete-cou in vivo & aeronautique militaire. Approches neuromusculaire et morphologique. Sciences du Vivant [q-bio]. Arts et Métiers ParisTech, 2007. Français. ⟨NNT : 2007ENAM0044⟩. ⟨pastel-00004773⟩

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