Cited by 96Neuroscience and Neural EngineeringTranscranial Magnetic Stimulation StudiesNeurological disorders and treatments

Morphologic changes after prolonged electrical stimulation of the cat's cortex at defined charge densities

Agnew, William F., Yuen, Ted G.H., McCreery, Douglas B.·1983·Experimental Neurology

Abstract

Experiments were conducted correlating neuronal activity, changes in ionic concentrations in the cerebral extracellular compartment, and neural damage during 4-h continuous electrical stimulations of the cat's sensorimotor cortex. Here we describe histological evaluations with the light and electron microscope of cortical tissue subjected to charge-balanced, biphasic, constant-current pulses delivered through subdurally implanted electrodes. Three combinations of charge density and pulse repetition rate were used. The results indicated a positive correlation of neural damage with both charge density and total charge. With electrical stimulation of low charge density [20 microC/cm2 . ph, 50 pulses per second (pps)] a transient increase in [K+]0 was observed with no histologically demonstrable neural damage. The most intense electrical stimulation studied (100 microC/cm2 . ph, 50 pps) resulted in a tonic increase and episodic fluctuations of [K+]0 and a marked decrease in [Ca2+]0 accompanied by moderate neural damage in the form of shrunken neurons, widespread extracellular edema, and swollen axons and dendrites.

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Crossref · 10.1016/0014-4886(83)90221-2

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11 of 11 references verified0 citation errors · 0 not checkable

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  • A large part of the literature and of our knowledge about neural stimulation is based on animal studies mostly conducted in the 1980s and 1990s.

    “Consequently, a large part of the literature and of our knowledge about neural stimulation is based on animal studies mostly conducted in the 1980s and 1990s [43–45, 62–64, 75, 92, 94, 96, 99, 100].”

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Authors
Agnew, W. F., Yuen, T. G. H., & McCreery, D. B.
Affiliations
Huntington Medical Research Institutes (US)
Corresponding author
Agnew, William F.
Venue
Experimental Neurology
Publisher
Elsevier BV
Published
1983-02
Volume
79
Issue
2
Pages
397-411
ISSN
0014-4886 (ISSN-L)
OpenAlex
W2070110201
Cited by
96
References
11
Citations by year
2025: 3 · 2024: 3 · 2022: 1 · 2021: 4 · 2020: 4 · 2019: 2 · 2018: 1 · 2017: 3 · 2016: 6 · 2015: 1 · 2014: 3 · 2013: 2 · 2012: 1
FWCI
1.00
Type
journal article
Language
en
Open access
closed
Locations
  • Experimental Neurology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
  • Life Sciences › Neuroscience › Neurology › Transcranial Magnetic Stimulation Studies
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
Keywords
electrical brain stimulation, sensorimotor cortex, charge density, nerve injury, extracellular potassium, extracellular calcium, extracellular edema, axonal swellings, dendritic swelling, biphasic current pulses, subdural electrodes, cats
MeSH terms
Animals, Calcium, Cats, Electric Stimulation, Female, Male, Neurons, Potassium, Somatosensory Cortex

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