Intralaminar and tectal projections to the subthalamus in the rat

Takako Kita, Naoki Shigematsu, Hitoshi Kita

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Projections from the posterior intralaminar thalamic nuclei and the superior colliculus (SC) to the subthalamic nucleus (STN) and the zona incerta (ZI) have been described in the primate and rodent. The aims of this study was to investigate several questions on these projections, using modern neurotracing techniques in rats, to advance our understanding of the role of STN and ZI. We examined whether projection patterns to the subthlamus can be used to identify homologues of the primate centromedian (CM) and the parafascicular nucleus (Pf) in the rodent, the topography of the projection including what percent of intralaminar neurons participate in the projections, and electron microscopic examination of intralaminar synaptic boutons in STN. The aim on the SC-subthalamic projection was to examine whether STN is the main target of the projection. This study revealed: (i) the areas similar to primate CM and Pf could be recognized in the rat; (ii) the Pf-like area sends a very heavy topographically organized projection to STN but very sparse projection to ZI, which suggested that Pf might control basal ganglia function through STN; (iii) the projection from the CM-like area to the subthalamus was very sparse; (iv) Pf boutons and randomly sampled asymmetrical synapses had similar distributions on the dendrites of STN neurons; and (v) the lateral part of the deep layers of SC sends a very heavy projection to ZI and moderate to sparse projection to limited parts of STN, suggesting that SC is involved in a limited control of basal ganglia function.

Original languageEnglish (US)
Pages (from-to)2899-2908
Number of pages10
JournalEuropean Journal of Neuroscience
Volume44
Issue number11
DOIs
StatePublished - Dec 1 2016

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Subthalamus
Subthalamic Nucleus
Superior Colliculi
Intralaminar Thalamic Nuclei
Primates
Basal Ganglia
Rodentia
Posterior Thalamic Nuclei
Neurons
Presynaptic Terminals
Dendrites
Synapses
Electrons
Zona Incerta

All Science Journal Classification (ASJC) codes

  • Neuroscience(all)

Cite this

Intralaminar and tectal projections to the subthalamus in the rat. / Kita, Takako; Shigematsu, Naoki; Kita, Hitoshi.

In: European Journal of Neuroscience, Vol. 44, No. 11, 01.12.2016, p. 2899-2908.

Research output: Contribution to journalArticle

Kita, Takako ; Shigematsu, Naoki ; Kita, Hitoshi. / Intralaminar and tectal projections to the subthalamus in the rat. In: European Journal of Neuroscience. 2016 ; Vol. 44, No. 11. pp. 2899-2908.
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