Overlap of nigrothalamic terminals and thalamostriatal neurons in the feline lateralis medialis-suprageniculate nucleus

Kaeko Hoshino, G. Eördegh, A. Nagy, G. Benedek, M. Norita

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The lateralis medialis-suprageniculate nucleus (LM-Sg) of the feline posterior thalamus is a relay nucleus with a clear visuomotor function. In this study, we examined the distribution of axon terminals of the nigral afferent to the LM-Sg following injection of an anterograde tracer, biocytin, into the substantia nigra pars reticulata, and the distribution of the thalamostriatal projection neurons in the LM-Sg following the injection of wheat germ agglutinin conjugated with horseradish peroxidase (WGA-HRP) as a retrograde tracer into the caudate nucleus. The biocytin-labeled terminal-like puncta were located in the ventromedial portion of this nucleus in such a way that most of the labeled elements took the form of swellings having boutons in places, while a minority appeared in clusters of 3-5 large terminal-like puncta. The retrograde WGA-HRP-labeled neurons were also found in the ventromedial part of the LM-Sg, and the distributions of labeled nigrothalamic axon terminals and labeled thalamostriatal projection neurons therefore overlapped in this region. The present results indicate that the nigral afferent may make synaptic contacts directly with the thalamostriatal projection neurons within the LM-Sg.

Original languageEnglish
Pages (from-to)203-211
Number of pages9
JournalActa physiologica Hungarica
Volume96
Issue number2
DOIs
Publication statusPublished - Jun 1 2009

Keywords

  • Biocytin
  • Cat
  • Caudate nucleus
  • Nigro-thalamo-striatal circuit
  • Substantia nigra
  • Thalamus
  • WGA-HRP

ASJC Scopus subject areas

  • Physiology (medical)

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