John Libbey Eurotext

L'Orthodontie Française


Influence of mandibular somesthesia on cephalic deviation and spatial representations Volume 91, issue 1-2, Juin 2020 - Numéro spécial 93e réunion scientifique Lille 2022 : Le diagnostic en orthodontie : actualités et perspectives


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Centre Abel Caumartin, Faculté de Chirurgie Dentaire, Sous-section ODF, Université de Lille, Place de Verdun, 59000 Lille, France
* Correspondance

Introduction: Mandibular proprioception would influence postural control. The development of spatial references are governed by the same afferences. This work aims to clarify the role of mandibular proprioception, implicated in postural and spatial dysfunctions, in the control of cephalic posture and spatial repositories. Materials and Methods: 24 subjects received a vibration of the masseter and temporal muscles. Measurements of head position (HP) (video), subjective visual vertical (SVV) and line bisection (LB) were obtained with and without vibration. Results: Without vibration, HP (0.31 ° ± 1.76 °) was negatively correlated with SVV (+ 0.23 ° ± 0.62 °, r22 = -0.44, p = 0.033) ; with vibration, HP on the opposite side to the stimulated muscle (t23 = 2.77, p = 0.011). There is a correlation between LB and SVV. Discussion: Without vibration, the Müller effect is found for SVV. The pseudo-negligence is not found. With vibration, the error of the HP and the SVV go in the same direction. No effects on the LB. Conclusion: Beyond local responses, the vibration can evoke global and oriented responses.