Cited by 6Memory and Neural MechanismsNeurological disorders and treatmentsNeuroscience and Neuropharmacology Research

Electrical stimulation of the lateral entorhinal cortex causes a frequency-specific BOLD response pattern in the rat brain

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Krautwald, Karla, Mahnke, Liv, Angenstein, Frank·2019·Frontiers in Neuroscience

Abstract

Although deep brain stimulation of the entorhinal cortex has recently shown promise in the treatment of early forms of cognitive decline, the underlying neurophysiological processes remain elusive. Therefore, the lateral entorhinal cortex (LEC) was stimulated with trains of continuous 5 Hz and 20 Hz pulses or with bursts of 100 Hz pulses to visualize activated neuronal networks, i.e., neuronal responses in the dentate gyrus and BOLD responses in the entire brain were simultaneously recorded. Electrical stimulation of the LEC caused a wide spread pattern of BOLD responses. Dependent on the stimulation frequency, BOLD responses were only triggered in the amygdala, infralimbic, prelimbic, and dorsal peduncular cortex (5 Hz), or in the nucleus accumbens, piriform cortex, dorsal medial prefrontal cortex, hippocampus (20 Hz), and contralateral entorhinal cortex (100 Hz). In general, LEC stimulation caused stronger BOLD responses in frontal cortex regions than in the hippocampus. Identical stimulation of the perforant pathway, a fiber bundle projecting from the entorhinal cortex to the dentate gyrus, hippocampus proper, and subiculum, mainly elicited significant BOLD responses in the hippocampus but rarely in frontal cortex regions. Consequently, BOLD responses in frontal cortex regions are mediated by direct projections from the LEC rather than via signal propagation through the hippocampus. Thus, the beneficial effects of deep brain stimulation of the entorhinal cortex on cognitive skills might depend more on an altered prefrontal cortex than hippocampal function.

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Crossref · 10.3389/fnins.2019.00539

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Authors
Krautwald, K., Mahnke, L., & Angenstein, F.
Affiliations
  • German Center for Neurodegenerative Diseases (DE)
  • Leibniz Institute for Neurobiology (DE)
Corresponding author
Angenstein, Frank
Venue
Frontiers in Neuroscience
Published
2019-05-24
Volume
13
Pages
539-539
ISSN
1662-453X (ISSN-L)
OpenAlex
W2945581354
Cited by
6
References
28
Citations by year
2026: 2 · 2024: 1 · 2021: 2 · 2020: 1
FWCI
0.44
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Informationszentrum Lebenswissenschaften (ZB MED) (submittedVersion, cc-by)
  • DZNE Pub (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
lateral entorhinal cortex, electrical stimulation, BOLD signal, stimulation frequency, perforant path, dentate gyrus, hippocampus, prefrontal cortex, amygdala, nucleus accumbens, piriform cortex, deep brain stimulation, cognitive decline, rat brain

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