Visual perception deficits in children after mild traumatic brain injury: psychophysics, electrophysiology and impact on postural stability

Renseignements sur le financement
Canadian Institutes of Health Research
  • Type de subvention: Subvention de fonctionnement
  • Années: 2010/11 à 2013/14
  • Financement total: $458,222
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Sommaire du projet

Over the last 10 years, the importance of detecting deficits after a mild traumatic head injury (mTBI) has grown significantly. Although cognitive, behavioural and physical symptoms are reported by the families and children with mTBI, the results of quantitative tests to objectively document these impairments are often negative and perhaps not sensitive enough. Studies by our team have shown that deficits in children with mTBI are revealed in situations requiring difficult motor or visuomotor tasks. Our hypothesis is that the deficits arise because of poor integration of information at high functioning levels. Using psychophysical and electrophysiological methods to test visual perception, we will evaluate high levels of sensory integration and processing in the brain. Simple and complex visual stimuli and optic flow patterns will be used to evaluate perception thresholds and visual evoked potentials. Visual perception deficits will also be studied in relation with standing postural stability and variables pertaining to the trauma (severity scores, duration of loss of consciousness, duration of post-traumatic amnesia, characteristics of the head injury sustained). If children with mTBI show persistant deficits, sensitivity to complex visual information may be used to understand motor and cognitive deficits important in daily life. Furthermore, these experimental procedures could be adapted for clinical use as a tool to disclose perceptual deficits, evaluate their evolution in time and the effects of rehabilitation.

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