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Maintaining balance requires visual, somatosensory and vestibular inputs as well as their integration. Failure to integrate information from these three systems may lead to an increased sway.When concentrating on the role of vision, body sway is attenuated by 50 % when the eyes are open compared to when they are closed (Wann et al., 1998). A study done by Wann et al. (1998) observed postural sway in children with DCD, where their head movement was recorded while standing with their eyes opened and closed. Children with DCD exhibited more postural sway compared to TD children when their eyes were closed (Greuze, 2003). DCD children may be less capable of relying on proprioceptive and vestibular information when visual cues are reduced (Deconinck et al., 2006). Another important factor to consider from this study is that DCD children also demonstrated significantly higher peak to peak sway when the room was moved. This result suggests that children with DCD depend on visual cues to a greater extent than TD children (Wann et al., 1998).
Children with DCD were seen to have an increased postural sway when standing on a foam surface, where the somatosensory condition is unreliable (Cherng et al., 2007). DCD children were unable to re-weigh their sensory information effectively. Thus, an increased sway in children with DCD is not due to a compromised utilization of individual sensory systems but rather, a deficit in re-weighing sensory information as well as in sensory organization (Cherng et al., 2007)
12019-10-13T15:05:21-07:00Emilie Rinaldi1c99118b882203af66a4b67e96fac3e31f84d7c2Dysfunctional anticipatory and feedback responses17plain2019-11-24T13:53:34-08:00Roxanna Kuperman2b8da7294f9b25d4de0f06a4011b6f2f7c5c422d
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12019-11-23T14:58:51-08:00baby falls when room moves1Demonstrates how visual information is used to control balance. Note that when the room (walls and ceiling) moves towards the toddler, toddler falls backward.plain2019-11-23T14:58:51-08:00