Bimanual coupling effects during arm immobilization and passive movements

Human Movement Science
Francesca GarbariniAnna Berti

Abstract

When humans simultaneously perform different movements with both hands, each limb movement interferes with the contralateral limb movement (bimanual coupling). Previous studies on both healthy volunteers and patients with central or peripheral nervous lesions suggested that such motor constraints are tightly linked to intentional motor programs, rather than to movement execution. Here, we aim to investigate this phenomenon, by using a circles-lines task in which, when subjects simultaneously draw lines with the right hand and circles with the left hand, both the trajectories tend to become ovals (bimanual coupling effect). In a first group, we immobilized the subjects' left arm with a cast and asked them to try to perform the bimanual task. In a second group, we passively moved the subjects' left arm and asked them to perform voluntary movements with their right arm only. If the bimanual coupling arises from motor intention and planning rather than spatial movements, we would expect different results in the two groups. In the Blocked group, where motor intentionality was required but movements in space were prevented by immobilization of the arm, a significant coupling effect (i.e., a significant increase of the ovalization ind...Continue Reading

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Citations

Mar 26, 2016·Frontiers in Behavioral Neuroscience·Francesca GarbariniPaola Rocca
Oct 27, 2015·Frontiers in Human Neuroscience·F GarbariniL Fadiga
May 16, 2017·Cognition·Francesco Della GattaCorrado Sinigaglia
Jan 17, 2019·Social Cognitive and Affective Neuroscience·Maria PyasikLorenzo Pia
Oct 2, 2019·Frontiers in Human Neuroscience·Valentina BrunoMaurizio Ferrarin
Jul 24, 2021·Scientific Reports·M BiggioMarco Bove

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