Open AccessDecreased utilization of allocentric coordinates during reaching movement in individuals with autism spectrum disorder
Author(s) -
Yumi Umesawa,
Takeshi Atsumi,
Reiko Fukatsu,
Masakazu Ide
Publication year - 2020
Publication title -
plos one
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.99
H-Index - 332
ISSN - 1932-6203
DOI - 10.1371/journal.pone.0236768
Subject(s) - autism spectrum disorder , autism , psychology , orientation (vector space) , frame of reference , eye movement , cognitive psychology , affect (linguistics) , neuroscience , audiology , physical medicine and rehabilitation , developmental psychology , medicine , communication , physics , geometry , mathematics , quantum mechanics
Despite numerous reports of abnormalities in limb motor controls in spatial orientation in individuals with autism spectrum disorder (ASD), the underlying mechanisms have not been elucidated. We studied the influence of allocentric coordinates on ongoing reaching movements, which has been reported to strongly affect the reaching movements of typically developing (TD) individuals. ASD and TD participants observed a target presented randomly on one of the four corners of a frame on a screen. After it disappeared, another frame was presented slightly shifted leftward/rightward. The participants touched the memorized position of the target relatively congruent with a reference frame (allocentric condition) or ignoring it (egocentric condition). Results suggested that TD individuals were apt to touch the positions in allocentric manner rather than egocentric manner, while ASDs did not show this prioritization. Our findings demonstrate that decreased utilization of visual landmarks in ongoing movement may underlie motor disabilities in autism.