Cited by 24Motor Control and AdaptationNeural and Behavioral Psychology StudiesNeurological disorders and treatments

Parallel explicit and implicit control of reaching

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Mazzoni, Pietro, Wexler, Nancy S.·2009·PLoS ONE

Abstract

BACKGROUND: Human movement can be guided automatically (implicit control) or attentively (explicit control). Explicit control may be engaged when learning a new movement, while implicit control enables simultaneous execution of multiple actions. Explicit and implicit control can often be assigned arbitrarily: we can simultaneously drive a car and tune the radio, seamlessly allocating implicit or explicit control to either action. This flexibility suggests that sensorimotor signals, including those that encode spatially overlapping perception and behavior, can be accurately segregated to explicit and implicit control processes. METHODOLOGY/PRINCIPAL FINDINGS: We tested human subjects' ability to segregate sensorimotor signals to parallel control processes by requiring dual (explicit and implicit) control of the same reaching movement and testing for interference between these processes. Healthy control subjects were able to engage dual explicit and implicit motor control without degradation of performance compared to explicit or implicit control alone. We then asked whether segregation of explicit and implicit motor control can be selectively disrupted by studying dual-control performance in subjects with no clinically manifest neurologic deficits in the presymptomatic stage of Huntington's disease (HD). These subjects performed successfully under either explicit or implicit control alone, but were impaired in the dual-control condition. CONCLUSION/SIGNIFICANCE: The human nervous system can exert dual control on a single action, and is therefore able to accurately segregate sensorimotor signals to explicit and implicit control. The impairment observed in the presymptomatic stage of HD points to a possible crucial contribution of the striatum to the segregation of sensorimotor signals to multiple control processes.

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Authors
Mazzoni, P., & Wexler, N. S.
Affiliations
  • Columbia University (US)
  • Hereditary Disease Foundation (US)
Corresponding author
Mazzoni, Pietro
Venue
PLoS ONE
Published
2009-10-22
Volume
4
Issue
10
Pages
e7557
ISSN
1932-6203 (ISSN-L)
OpenAlex
W2045441997
Cited by
24
References
64
Citations by year
2023: 1 · 2022: 1 · 2021: 1 · 2020: 1 · 2019: 1 · 2018: 2 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 3 · 2013: 5
FWCI
0.65
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Parkinson's Disease Foundation
  • Hereditary Disease Foundation
  • National Institute of Neurological Disorders and Stroke (NS049206, R01NS049206)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
dual control, reaching movements, presymptomatic Huntington's disease, striatum
MeSH terms
Adult, Attention, Female, Humans, Learning, Male, Middle Aged, Motor Skills, Movement, Neuropsychological Tests, Psychomotor Performance, Serial Learning, Cohort Studies

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