Cited by 154Neuroscience and Neuropharmacology ResearchNeurological disorders and treatmentsMemory and Neural Mechanisms

Ventral Medial Nucleus Neurons Send Thalamocortical Afferents More Widely and More Preferentially to Layer 1 than Neurons of the Ventral Anterior–Ventral Lateral Nuclear Complex in the Rat

Kuramoto, Eriko, Ohno, Sachi, Furuta, Takahiro, Unzai, Tomo, Tanaka, Yasuhiro R., Hioki, Hiroyuki, Kaneko, Takeshi·2015·Cerebral Cortex

Abstract

Not only inhibitory afferent-dominant zone (IZ) of the ventral anterior-ventral lateral thalamic complex (VA-VL) but also the ventral medial nucleus (VM) is known to receive strong inputs from the basal ganglia and send axons to motor areas. We previously reported differences in axonal arborization between IZ neurons and the other VA-VL neurons in rats by single-neuron tracing with viral vectors. In the present study, the axonal arborization of single VM neurons was visualized by the same method, and compared with that of IZ neurons. VM neurons formed fewer axon collaterals in the striatum, but sent axon fibers more widely and more preferentially (79% of fibers) to layer 1 of cortical areas than IZ neurons. Furthermore, the VM seemed to contain at least 2 types of neurons; a major population of VM neurons sent axon fibers principally to motor-associated areas as VA-VL neurons did, and the other population projected mainly to orbital or cingulate areas. Although both VM and IZ neurons receive strong basal ganglia inputs, these results suggest that VM neurons, at a single neuron level, innervate the apical dendrites of cortical pyramidal neurons more intensely and more widely than IZ neurons.

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  1. Jones EG. 2007. The Thalamus. 2nd ed. Cambridge: Cambridge Univer- sity Press.

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Authors
Kuramoto, E., Ohno, S., Furuta, T., Unzai, T., Tanaka, Y. R., Hioki, H., & Kaneko, T.
Affiliations
  • Kyoto University (JP)
  • Kagoshima University (JP)
Corresponding author
Kuramoto, Eriko
Venue
Cerebral Cortex
Published
2013-08-22
Volume
25
Issue
1
Pages
221-235
ISSN
  • 1047-3211 (ISSN-L)
  • 1460-2199
OpenAlex
W2154123926
Cited by
154
References
80
Citations by year
2026: 5 · 2025: 8 · 2024: 8 · 2023: 18 · 2022: 9 · 2021: 38 · 2020: 10 · 2019: 15 · 2018: 13 · 2017: 10 · 2016: 11 · 2015: 7 · 2014: 2
FWCI
3.27
Type
journal article
Language
en
Open access
closed
Locations
  • Cerebral Cortex (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Ministry of Education, Culture, Sports, Science and Technology (23123510, 23650175, 22110007, 25250006)
  • Foundation of Synapse and Neurocircuit Pathology
  • Japan Society for the Promotion of Science (25123709, 23700413, 24890179, 24500409, 14J08449, 24500408, 23115101, 15K14333, 15H01430, 25830034)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
thalamocortical afferents, axonal arborization, striatum, cortical pyramidal neurons, motor areas, orbital cortex, cingulate cortex, single-neuron tracing, viral vectors, rats
MeSH terms
Afferent Pathways, Animals, Axons, Cerebral Cortex, Dendrites, Male, Neurons, Rats, Sprague-Dawley, Ventral Thalamic Nuclei, Rats

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