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Article

Functional Roles of Saccades for a Hand Movement

School of Life Science and Technology, Tokyo Institute of Technology, Tokyo 152-8550, Japan
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Appl. Sci. 2020, 10(9), 3066; https://doi.org/10.3390/app10093066
Received: 6 March 2020 / Revised: 24 April 2020 / Accepted: 27 April 2020 / Published: 28 April 2020
(This article belongs to the Special Issue Movement Biomechanics and Motor Control)
An eye saccade provides appropriate visual information for motor control. The present study was aimed to reveal the role of saccades in hand movements. Two types of movements, i.e., hitting and circle-drawing movements, were adopted, and saccades during the movements were classified as either a leading saccade (LS) or catching saccade (CS) depending on the relative gaze position of the saccade to the hand position. The ratio of types of the saccades during the movements was heavily dependent on the skillfulness of the subjects. In the late phase of the movements in a less skillful subject, CS tended to occur in less precise movements, and precision of the movement tended to be improved in the subsequent movement in the hitting. While LS directing gaze to a target point was observed in both types of the movements regardless of skillfulness of the subjects, LS in between a start point and a target point, which led gaze to a local minimum variance point on a hand movement trajectory, was exclusively found in the drawing in a less skillful subject. These results suggest that LS and some types of CS may provide positional information of via-points in addition to a target point and visual information to improve precision of a feedforward controller in the brain, respectively. View Full-Text
Keywords: eye movements; reaching arm movements; eye-hand coordination; visual information; movement precision; movement segment; forward model; control model of the brain eye movements; reaching arm movements; eye-hand coordination; visual information; movement precision; movement segment; forward model; control model of the brain
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MDPI and ACS Style

Sakazume, Y.; Furubayashi, S.; Miyashita, E. Functional Roles of Saccades for a Hand Movement. Appl. Sci. 2020, 10, 3066. https://doi.org/10.3390/app10093066

AMA Style

Sakazume Y, Furubayashi S, Miyashita E. Functional Roles of Saccades for a Hand Movement. Applied Sciences. 2020; 10(9):3066. https://doi.org/10.3390/app10093066

Chicago/Turabian Style

Sakazume, Yuki, Sho Furubayashi, and Eizo Miyashita. 2020. "Functional Roles of Saccades for a Hand Movement" Applied Sciences 10, no. 9: 3066. https://doi.org/10.3390/app10093066

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