Proprioceptive and visual motion detection acuity contribute to children's dynamic postural control.

Acquiring efficient postural control strategies is key to children's proper motor development. For that, the brain needs to continuously integrate sensory information and convert it into corrective motor commands. Although this entire process naturally hinges on the reliability of senses, very few studies have investigated sensory acuity and its role in postural stability during development. Clarifying this could lead to a better understanding of conditions, such as developmental coordination disorder, where the impairment of balance control is substantial. Therefore, we aim to determine the extent to which postural stability depends on sensory acuity, specifically proprioception and visual motion detection acuity, in typically developing children. Twenty-five typically developing school-aged children took part in the study. A visual motion detection test (VMDT) assessed their visual motion acuity. An ankle joint position sense test (aJPST) assessed their proprioceptive acuity. Force-plate-based posturography quantified their static standing balance stability with the standard deviation of the center of pressure in the antero-posterior (sdCoP