Veering while walking is often reported in individuals with @entity191 ( @entity191 ), with potential mechanisms being vision-based (asymmetrical perception of the visual environment) or motoric (asymmetry in stride length between relatively affected and non-affected body side). We examined these competing hypotheses by assessing veering in 13 normal control @entity1 (NC) and 20 non-demented individuals with @entity191 : 9 with left-side onset of motor symptoms (LPD) and 11 with right-side onset (RPD). @entity1 walked in a corridor under three conditions: eyes-open, egocentric reference point ( @entity31944 ; walk toward a subjectively perceived center of a target at the end of the corridor), and vision-occluded. The @entity227 predicted that LPD @entity1 would veer rightward, in line with their rightward @entity227 , whereas those with RPD would veer leftward. The motor hypothesis predicted the opposite pattern of results, with veering toward the side with shorter stride length. Results supported the @entity227 . Under visual guidance, RPD @entity1 significantly differed from NC, veering leftward despite a shorter right- than left-stride length, whereas LPD veered rightward (not significantly different from NC), despite shorter left- than right-stride length. LPD @entity1 showed significantly reduced rightward veering and stride asymmetry when they walked in the presence of a visual landmark ( @entity31944 ) than in the @entity2194 without a target. There were no group differences in veering in the vision-occluded condition. The findings suggest that interventions to correct walking abnormalities such as veering in @entity191 should incorporate vision-based strategies rather than solely addressing motor asymmetries, and should be tailored to the distinctive navigational profiles of LPD and RPD.

Veering in XXXX : Primacy of visual over motor contributions.

@entity1 :: ('9606', 'Species') :: ['participants', 'Participants'] @entity2194 :: ('MESH:D005128', 'Disease') :: ['eyes-open condition'] @entity227 :: ('MESH:D014786', 'Disease') :: ['visual-field bias', 'visual hypothesis'] @entity31944 :: ('643332', 'Gene') :: ['ECRP'] @entity191 :: ('MESH:D010300', 'Disease') :: ["Parkinson's disease", 'PD']
@entity191 :: (MESH:D010300,Disease) :: ['hemi-Parkinson's disease']
