Etude de la fonction d'équilibration chez des patients implantés cochléaires unilatéraux

Abstract : Context: Deafness is a serious neuro-sensorial trouble affecting 5% of the world population and a public health matter. Nonetheless, cochlear implant is a solution re-establishing sound perception. Deeply deaf people experience a decrease in quality of life (Rumeau et al., 2014), as well as dizziness and nausea (Parmar et al., 2012). These problems result in altering one of the most important human functions, balance. Postural capacity cannot be summed up to antigravitational function. It also consists in an interface with the environment, i.e. perception. Goal: Describing the evolution of spatial orientation perceptions and the evolution of postural performance for deeply deaf people in a context of multi-sensorial stimulation, before and after cochlear implant. The aim is to find changes in scores between test and control individuals. These people are paired by age and sex. Results: Deeply deaf people do not show a decrease in spatial orientation perception before the surgery but experience a worsening in postural performance in cases where the vestibular sensor is dominant in postural regulation. After the surgery, results prove a worsening in orientation perception on the opposite side of the implant. However, the implant does not reduce postural performance. Conclusion: The pathologies causing deafness reduce the balance function of deaf people, which is observed in a deterioration of the vestibular sensor. Moreover, the implant seems to affect the gravi-perceptive function of the vestibule. This results in altering the perception of the gravitational vertical on the opposite side of the implant.
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Master thesis
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Dimitri Fabre. Etude de la fonction d'équilibration chez des patients implantés cochléaires unilatéraux. Sciences de l'Homme et Société. 2015. ⟨hal-01828129⟩

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