Cited by 45Motor Control and AdaptationNeural dynamics and brain functionMemory and Neural Mechanisms

Neuronal Activity in Motor Cortical Areas Reflects the Sequential Context of Movement

Ben-Shaul, Yoram, Drori, Rotem, Asher, Itay, Stark, Eran, Nadasdy, Zoltan, Abeles, Moshe·2004·Journal of Neurophysiology

Abstract

Natural actions can be described as chains of simple elements, whereas individual motion elements are readily concatenated to generate countless movement sequences. Sequence-specific neurons have been described extensively, suggesting that the motor system may implement temporally complex motions by using such neurons to recruit lower-level movement neurons modularly. Here, we set out to investigate whether activity of movement-related neurons is independent of the sequential context of the motion. Two monkeys were trained to perform linear arm movements either individually or as components of double-segment motions. However, comparison of neuronal activity between these conditions is delicate because subtle kinematic variations generally occur within different contexts. We therefore used extensive procedures to identify the contribution of variations in motor execution to differences in neuronal activity. Yet, even after application of these procedures we find that neuronal activity in the motor cortex (PMd and M1) associated with a given motion segment differs between the two contexts. These differences appear during preparation and become even more prominent during motion execution. Interestingly, despite context-related differences on the single-neuron level, the population as a whole still allows a reliable readout of movement direction regardless of the sequential context. Thus the direction of a movement and the sequential context in which it is embedded may be simultaneously and reliably encoded by neurons in the motor cortex.

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Crossref · 10.1152/jn.00957.2003

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  • Electrophysiological findings show the neocortex generates precisely timed spatiotemporal spike activity patterns during various motor and non-motor cognitive tasks.

    “This concept receives additional support from electrophysiological findings showing that the neocortex generates precisely timed spatiotemporal spike activity patterns during various motor and non-motor cognitive tasks [219–221].”

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Authors
Ben-Shaul, Y., Drori, R., Asher, I., Stark, E., Nadasdy, Z., & Abeles, M.
Affiliations
  • Department of Physiology and the Interdisciplinary Center for Neural Computation and the Hebrew University–Hadassah Medical School, Jerusalem 91120, Israel
  • Hebrew University of Jerusalem (IL)
Venue
Journal of Neurophysiology
Published
2004-04
Volume
91
Issue
4
Pages
1748-1762
ISSN
  • 0022-3077 (ISSN-L)
  • 1522-1598
OpenAlex
W2005567551
Cited by
45
References
41
Citations by year
2025: 3 · 2024: 10 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2015: 2 · 2014: 2 · 2013: 1 · 2012: 4
FWCI
1.34
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Neurophysiology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
motor cortex, movement sequences, PMD, primary motor cortex, arm movement, motor preparation, population coding, kinematic variability
MeSH terms
Action Potentials, Animals, Behavior, Animal, Electrophysiology, Female, Macaca fascicularis, Motion Perception, Motor Cortex, Movement, Neurons, Psychomotor Performance, Reaction Time, Reward, Time Factors

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