Movement variability resulting from different noise sources: A simulation study

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Limb movements are highly variable due in part to noise occurring at different stages of movement production, from sensing the position of the limb to the issuing of motor commands. Here we used a simulation approach to predict the effects of noise associated with (1) sensing the position of the limb ('position sensing noise') and (2) planning an appropriate movement vector ('trajectory planning noise'), as well as the combined effects of these factors, on arm movement variability across the workspace. Results were compared to those predicted by a previous model of the noise associated with movement execution. We found that the effects of sensing and planning related noise on movement variability were highly dependent upon both the planned movement direction and the initial configuration of the arm and differed in several respects from the effects of execution noise. In addition, sensing and planning noise interacted in a complex manner across movement directions. These results provide important insights into the relative roles of sensing, planning and execution noise in movement variability that could prove useful for understanding and addressing the exaggerated variability that arises from neurological damage, and for interpreting neurophysiological investigations that seek to relate neural variability to behavioral variability.

Original languageEnglish (US)
Pages (from-to)772-790
Number of pages19
JournalHuman Movement Science
Volume31
Issue number4
DOIs
StatePublished - Aug 2012

Fingerprint

Noise
Extremities
Arm

Keywords

  • Brain damage
  • Learning and memory
  • Motor processes
  • Neurological disorders
  • Sensory perception

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Biophysics
  • Experimental and Cognitive Psychology

Cite this

Movement variability resulting from different noise sources : A simulation study. / Shi, Y.; Buneo, Christopher.

In: Human Movement Science, Vol. 31, No. 4, 08.2012, p. 772-790.

Research output: Contribution to journalArticle

@article{e686133cfa194901a2a16849235f8054,
title = "Movement variability resulting from different noise sources: A simulation study",
abstract = "Limb movements are highly variable due in part to noise occurring at different stages of movement production, from sensing the position of the limb to the issuing of motor commands. Here we used a simulation approach to predict the effects of noise associated with (1) sensing the position of the limb ('position sensing noise') and (2) planning an appropriate movement vector ('trajectory planning noise'), as well as the combined effects of these factors, on arm movement variability across the workspace. Results were compared to those predicted by a previous model of the noise associated with movement execution. We found that the effects of sensing and planning related noise on movement variability were highly dependent upon both the planned movement direction and the initial configuration of the arm and differed in several respects from the effects of execution noise. In addition, sensing and planning noise interacted in a complex manner across movement directions. These results provide important insights into the relative roles of sensing, planning and execution noise in movement variability that could prove useful for understanding and addressing the exaggerated variability that arises from neurological damage, and for interpreting neurophysiological investigations that seek to relate neural variability to behavioral variability.",
keywords = "Brain damage, Learning and memory, Motor processes, Neurological disorders, Sensory perception",
author = "Y. Shi and Christopher Buneo",
year = "2012",
month = "8",
doi = "10.1016/j.humov.2011.07.003",
language = "English (US)",
volume = "31",
pages = "772--790",
journal = "Human Movement Science",
issn = "0167-9457",
publisher = "Elsevier",
number = "4",

}

TY - JOUR

T1 - Movement variability resulting from different noise sources

T2 - A simulation study

AU - Shi, Y.

AU - Buneo, Christopher

PY - 2012/8

Y1 - 2012/8

N2 - Limb movements are highly variable due in part to noise occurring at different stages of movement production, from sensing the position of the limb to the issuing of motor commands. Here we used a simulation approach to predict the effects of noise associated with (1) sensing the position of the limb ('position sensing noise') and (2) planning an appropriate movement vector ('trajectory planning noise'), as well as the combined effects of these factors, on arm movement variability across the workspace. Results were compared to those predicted by a previous model of the noise associated with movement execution. We found that the effects of sensing and planning related noise on movement variability were highly dependent upon both the planned movement direction and the initial configuration of the arm and differed in several respects from the effects of execution noise. In addition, sensing and planning noise interacted in a complex manner across movement directions. These results provide important insights into the relative roles of sensing, planning and execution noise in movement variability that could prove useful for understanding and addressing the exaggerated variability that arises from neurological damage, and for interpreting neurophysiological investigations that seek to relate neural variability to behavioral variability.

AB - Limb movements are highly variable due in part to noise occurring at different stages of movement production, from sensing the position of the limb to the issuing of motor commands. Here we used a simulation approach to predict the effects of noise associated with (1) sensing the position of the limb ('position sensing noise') and (2) planning an appropriate movement vector ('trajectory planning noise'), as well as the combined effects of these factors, on arm movement variability across the workspace. Results were compared to those predicted by a previous model of the noise associated with movement execution. We found that the effects of sensing and planning related noise on movement variability were highly dependent upon both the planned movement direction and the initial configuration of the arm and differed in several respects from the effects of execution noise. In addition, sensing and planning noise interacted in a complex manner across movement directions. These results provide important insights into the relative roles of sensing, planning and execution noise in movement variability that could prove useful for understanding and addressing the exaggerated variability that arises from neurological damage, and for interpreting neurophysiological investigations that seek to relate neural variability to behavioral variability.

KW - Brain damage

KW - Learning and memory

KW - Motor processes

KW - Neurological disorders

KW - Sensory perception

UR - http://www.scopus.com/inward/record.url?scp=84870255372&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84870255372&partnerID=8YFLogxK

U2 - 10.1016/j.humov.2011.07.003

DO - 10.1016/j.humov.2011.07.003

M3 - Article

C2 - 22795761

AN - SCOPUS:84870255372

VL - 31

SP - 772

EP - 790

JO - Human Movement Science

JF - Human Movement Science

SN - 0167-9457

IS - 4

ER -