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The Claustrum of the Pig: An Immunohistochemical and a Quantitative Golgi Study. | LitMetric

AI Article Synopsis

  • The claustrum (Cl) remains a complex area of study, with pigs being a valuable model due to their brain similarity to humans, especially regarding the Cl's unique morphology.
  • Despite having extensive data on the anatomy and general structure of the swine Cl, there is a significant gap in understanding the dendritic structure of its neurons, which is crucial for discerning the Cl's microcircuitry and functions.
  • The research involved a quantitative study of the dendrites of spiny neurons and an analysis of parvalbumin-immunoreactive interneurons, revealing that the Cl's dendritic architecture and interneuron distribution vary with its shape, hinting at a specific function for the larger posterior area.

Article Abstract

Despite increasing interest in the claustrum (Cl) over the last decades, its function is still a puzzling problem. Among the experimental species of potential use in Cl research, the pig is considered an interesting model, because of the similarities of its brain with the corresponding cortical and subcortical human structures. The swine Cl presents a peculiar morphology, characterized by a wide posterior enlargement, ideal for physiological investigations. There is a wealth of data on general anatomy, cytoarchitecture, and chemo architecture of the Cl, but much less is known about the dendritic morphometry of its neurons. Dendritic length and branching pattern are key features to understand the organization of the microcircuitry, and thus the delineation of the structure-function relationships of the Cl. To this effect, we undertook (a) a quantitative study of the dendrites of the spiny neurons of the swine Cl, employing the Golgi staining; and (b) an immunohistochemical analysis to describe the distribution of the parvalbumin (PV)-immunoreactive interneurons throughout the same nucleus. Taken together, the results that we report here show that the dendritic architecture and the distribution of the PV expressing interneurons change when the Cl of this species changes its shape along the rostro-caudal axis, thus suggesting a potentially specific function for the large posterior puddle. Anat Rec, 302:1638-1646, 2019. © 2019 American Association for Anatomy.

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http://dx.doi.org/10.1002/ar.24073DOI Listing

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