Cited by 247Neurological disorders and treatmentsMotor Control and AdaptationNeurotransmitter Receptor Influence on Behavior

Relations between movement and single cell discharge in the substantia nigra of the behaving monkey

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DeLong, MR, Crutcher, MD, Georgopoulos, AP·1983·The Journal of Neuroscience

Abstract

In order to clarify the motor functions of the substantia nigra (SN), we studied the activity of single neurons in both the pars compacta (SNpc) and the pars reticulata (SNpr) of behaving primates during performance of a visuomotor arm-tracking task.We also studied the relations of neuronal activity to active movements and passive manipulations of the limbs and other body parts outside the behavioral paradigm.On the basis of spontaneous discharge rates, most cells within the SN fell into two categories: (1) low discharge rate (LDR) cells (n = 53, mean rate 2. 1 impulses/set) and ( 2) high discharge rate (HDR) cells (n = 129, mean rate 60.4 impulses/set).HDR neurons had firing rates and discharge patterns similar to neurons in the inner segment of the globus pallidus.Most (83%) LDR neurons were located within the SNpc, and all HDR neurons were located in the SNpr.None of the LDR neurons in SNpc exhibited detectable phasic changes in discharge in relation to active movements or passive manipulations.Only a small number of SNpc cells showed modulation in the behavioral paradigm.These findings suggest that the nigrostriatal dopamine system, rather than conveying highly specific information about movement to the striatum, may exert a more tonic modulatory effect upon the striatum.However, phasic release of dopamine in the striatum may be affected by presynaptic mechanisms.Twenty-five percent of cells in the SNpr were related to licking and chewing movements.Cells specifically related to limb movements were rare.Some of these arm movement-related neurons showed a relation to movement parameters.A small number of SNpr cells (3%) were related to eye movements or exhibited responses to gross visual stimulation.Neurons related to licking and chewing were located primarily in the centrolateral portions of the nucleus.These findings suggest that the lateral portion of the SNpr may play a role in the control of orofacial movements.

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Crossref · 10.1523/jneurosci.03-08-01599.1983

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  • These slow changes fail to occur with more-controlled arm, mouth and eye movements in a considerable range of studies.

    “these changes fail to occur with more-controlled arm, mouth and eye movements in a considerable range of studies2,5,9,13,151,152,154”

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Authors
DeLong, M., Crutcher, M., & Georgopoulos, A.
Affiliations
Johns Hopkins University (US)
Venue
The Journal of Neuroscience
Published
1983-08-01
Volume
3
Issue
8
Pages
1599-1606
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1497648884
Cited by
247
References
35
Citations by year
2026: 2 · 2025: 5 · 2024: 4 · 2023: 6 · 2022: 4 · 2021: 3 · 2020: 1 · 2019: 5 · 2018: 2 · 2017: 6 · 2016: 11 · 2015: 3 · 2014: 6 · 2012: 5
FWCI
10.29
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Motor Control and Adaptation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
substantia nigra, substantia nigra pars compacta, substantia nigra pars reticulata, single-unit activity, dopamine, nigrostriatal pathway, striatum, orofacial movements, eye movements, limb movement, motor control, primate behavior
MeSH terms
Animals, Behavior, Animal, Brain Mapping, Face, Macaca mulatta, Mastication, Mouth, Movement, Neurons, Substantia Nigra

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