Oculomotor Impairments in Developmental Dyspraxia.

Oculomotor Impairments in Developmental Dyspraxia. Cerebellum. 2016 Aug 1; Authors: Gaymard B, Giannitelli M, Challes G, Rivaud-Péchoux S, Bonnot O, Cohen D, Xavier J Abstract Children with developmental dyspraxia (DD) express impairments in the acquisition of various motor skills and in the development of their social cognition abilities. Although the neural bases of this condition are not fully understood, they are thought to involve frontal cortical areas, subcortical structures, and the cerebellum. Although cerebellar dysfunction is typically difficult to assess and quantify using traditional neurophysiological methods, oculomotor analysis may provide insight into specific cerebellar patterns. The aim of the present study was to investigate, in dyspraxic and typically developing subjects, various oculomotor saccade tasks specifically designed to reveal frontal and cerebellar dysfunction. In addition to evidence supporting prefrontal dysfunction, our results revealed increased variability of saccade accuracy consistent with cerebellar impairments. Furthermore, we found that dyspraxic patients showed decreased velocities of non-visually guided saccades. A closer analysis revealed significant differences in saccade velocity profiles with slightly decreased maximum saccade velocities but markedly prolonged deceleration phases. We show that this pattern was not related to a decreased state of alertness but was suggestive of cerebella...
Source: Cerebellum - Category: Neuroscience Authors: Tags: Cerebellum Source Type: research