Marie-Désirée Ezane1, Cynthia Lions2, Emmanuel Bui Quoc3, Chantal Milleret4, Maria Pia Bucci1. 1. UMR 1141, INSERM - Université Paris 7, Hôpital Robert Debré, 48 boulevard Sérurier, Paris, France. 2. UMR 1141, INSERM - Université Paris 7, Hôpital Robert Debré, 48 boulevard Sérurier, Paris, France. cynthia.lions.giraud@gmail.com. 3. Service d'Ophtalmologie, Hôpital Robert Debré, 48 Boulevard Sérurier, 75019, Paris, France. 4. Collège de France, Center Interdisciplinary Research in Biology (CIRB), Spatial Memory and Navigation Team, 75005, Paris, France.
Abstract
PURPOSE: To analyse postural performances of strabismic children, both in the spatial and the temporal domains, by wavelet transformation, comparing both stable and unstable situations. METHODS: Twenty-six strabismic children aged from 4 to 11 years old and 26 age-matched normal children participated in the study. Postural performances were evaluated using the Framiral® platform. Posture was recorded in the following conditions: eyes open fixating a target and eyes closed on stable and unstable platforms. RESULTS: For both strabismic and non-strabismic children, the surface and the mean velocity of the center of pressure (CoP) were significantly larger in the eyes closed on unstable platform condition, but this was much more pronounced in case of strabismus. Spectral power index and cancelling time were also found to be altered in strabismic children compared to non-strabismic children. CONCLUSIONS: This data demonstrates poor postural stability for both groups on an unstable platform with the eyes closed. However, strabismic children had significantly worse performance than non-strabismic children. Strabismic children also engage more energy to stabilize their posture by using visuo-vestibular sensory inputs to compensate their altered vision due to strabismus, in comparison to non-strabismic children.
PURPOSE: To analyse postural performances of strabismic children, both in the spatial and the temporal domains, by wavelet transformation, comparing both stable and unstable situations. METHODS: Twenty-six strabismic children aged from 4 to 11 years old and 26 age-matched normal children participated in the study. Postural performances were evaluated using the Framiral® platform. Posture was recorded in the following conditions: eyes open fixating a target and eyes closed on stable and unstable platforms. RESULTS: For both strabismic and non-strabismic children, the surface and the mean velocity of the center of pressure (CoP) were significantly larger in the eyes closed on unstable platform condition, but this was much more pronounced in case of strabismus. Spectral power index and cancelling time were also found to be altered in strabismic children compared to non-strabismic children. CONCLUSIONS: This data demonstrates poor postural stability for both groups on an unstable platform with the eyes closed. However, strabismic children had significantly worse performance than non-strabismic children. Strabismic children also engage more energy to stabilize their posture by using visuo-vestibular sensory inputs to compensate their altered vision due to strabismus, in comparison to non-strabismic children.
Entities:
Keywords:
Children; Postural control; Spatial and temporal analyses; Strabismus
Authors: Simona Caldani; Maria Pia Bucci; Maud Tisné; Isabelle Audo; Thierry Van Den Abbeele; Sylvette Wiener-Vacher Journal: Front Neurol Date: 2019-08-08 Impact factor: 4.003
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