The sources of variability in the time course of reaching movements

Ken ichi Morishige, Rieko Osu, Hiroyuki Miyamoto, Mitsuo Kawato

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Movement variability plays a vital role in motor control. Although previous studies have examined the size and direction of the variability at end points, little research has examined how the variability changes during the time of move. The time course of the variability on point-to-point movements seems to be composed of two different properties: one increases monotonically and the other has an increasing-decreasing property. The first one can be explained by neural noise at the control level, such as the signal-dependent noise (SDN). However, how do we explain the latter one? Our numerical experiment hypothesized the time-jitter noise at trajectory planning level, which represents local advance or delay time of the reference trajectory for reaching movements. The simulation result could well reproduce the feature of the behavioral results.

Original languageEnglish
Pages (from-to)105-108
Number of pages4
JournalInternational Congress Series
Volume1291
DOIs
Publication statusPublished - 2006 Jun
Externally publishedYes

Fingerprint

Noise
Research
Direction compound

Keywords

  • Reaching movement
  • Signal-dependent noise
  • Time-jitter noise
  • Variability

ASJC Scopus subject areas

  • Medicine(all)

Cite this

The sources of variability in the time course of reaching movements. / Morishige, Ken ichi; Osu, Rieko; Miyamoto, Hiroyuki; Kawato, Mitsuo.

In: International Congress Series, Vol. 1291, 06.2006, p. 105-108.

Research output: Contribution to journalArticle

Morishige, Ken ichi ; Osu, Rieko ; Miyamoto, Hiroyuki ; Kawato, Mitsuo. / The sources of variability in the time course of reaching movements. In: International Congress Series. 2006 ; Vol. 1291. pp. 105-108.
@article{51ffcf2043f548ff911b426e9f0feea1,
title = "The sources of variability in the time course of reaching movements",
abstract = "Movement variability plays a vital role in motor control. Although previous studies have examined the size and direction of the variability at end points, little research has examined how the variability changes during the time of move. The time course of the variability on point-to-point movements seems to be composed of two different properties: one increases monotonically and the other has an increasing-decreasing property. The first one can be explained by neural noise at the control level, such as the signal-dependent noise (SDN). However, how do we explain the latter one? Our numerical experiment hypothesized the time-jitter noise at trajectory planning level, which represents local advance or delay time of the reference trajectory for reaching movements. The simulation result could well reproduce the feature of the behavioral results.",
keywords = "Reaching movement, Signal-dependent noise, Time-jitter noise, Variability",
author = "Morishige, {Ken ichi} and Rieko Osu and Hiroyuki Miyamoto and Mitsuo Kawato",
year = "2006",
month = "6",
doi = "10.1016/j.ics.2006.01.038",
language = "English",
volume = "1291",
pages = "105--108",
journal = "International Congress Series",
issn = "0531-5131",

}

TY - JOUR

T1 - The sources of variability in the time course of reaching movements

AU - Morishige, Ken ichi

AU - Osu, Rieko

AU - Miyamoto, Hiroyuki

AU - Kawato, Mitsuo

PY - 2006/6

Y1 - 2006/6

N2 - Movement variability plays a vital role in motor control. Although previous studies have examined the size and direction of the variability at end points, little research has examined how the variability changes during the time of move. The time course of the variability on point-to-point movements seems to be composed of two different properties: one increases monotonically and the other has an increasing-decreasing property. The first one can be explained by neural noise at the control level, such as the signal-dependent noise (SDN). However, how do we explain the latter one? Our numerical experiment hypothesized the time-jitter noise at trajectory planning level, which represents local advance or delay time of the reference trajectory for reaching movements. The simulation result could well reproduce the feature of the behavioral results.

AB - Movement variability plays a vital role in motor control. Although previous studies have examined the size and direction of the variability at end points, little research has examined how the variability changes during the time of move. The time course of the variability on point-to-point movements seems to be composed of two different properties: one increases monotonically and the other has an increasing-decreasing property. The first one can be explained by neural noise at the control level, such as the signal-dependent noise (SDN). However, how do we explain the latter one? Our numerical experiment hypothesized the time-jitter noise at trajectory planning level, which represents local advance or delay time of the reference trajectory for reaching movements. The simulation result could well reproduce the feature of the behavioral results.

KW - Reaching movement

KW - Signal-dependent noise

KW - Time-jitter noise

KW - Variability

UR - http://www.scopus.com/inward/record.url?scp=33744816178&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33744816178&partnerID=8YFLogxK

U2 - 10.1016/j.ics.2006.01.038

DO - 10.1016/j.ics.2006.01.038

M3 - Article

VL - 1291

SP - 105

EP - 108

JO - International Congress Series

JF - International Congress Series

SN - 0531-5131

ER -