Abstract:
:A number of studies have reported that the digit ratio 2D:4D (length of the second finger divided by length of the fourth finger) is smaller (longer fourth digit) in autism spectrum disorder (ASD) than in typically developed (TD) controls. Because form and function are closely related in biological systems, we hypothesized that the 4D dominance occurs in not only finger morphology but also physical performance in ASD. Individuals with ASD and TD controls participated in a multi-digit force-producing task. Individuals with ASD showed a significant 4D dependence compared to TD controls in the task. We found a significant correlation between 4D dependence and scores of the standard diagnostic instrument across individuals with ASD. Our analysis of functional connectivity in resting-state functional MRI suggests that connectivity between the visual cortex and the cerebellum contributes to the 4D dependence. Collectively, these results extend the 2D:4D ratio beyond being a morphological marker to being involved in motor functions in the form of 4D dependence in a multi-digit force task.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Togo S,Itahashi T,Hashimoto R,Cai C,Kanai C,Kato N,Imamizu Hdoi
10.1038/s41598-018-38421-6subject
Has Abstractpub_date
2019-02-11 00:00:00pages
1737issue
1issn
2045-2322pii
10.1038/s41598-018-38421-6journal_volume
9pub_type
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