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Delineation of thalamic nuclei immunoreactive for calcium-binding proteins in and around the posterior pole of the ventral posterior complex

  • Edward Jones (a1), Kristyna Lensky (a1) and Victor Chan (a1)

Abstract

An atlas of serial sections stained alternately for one of the three calcium-binding proteins, calbindin, calretinin or parvalbumin, or for markers that demarcate borders of thalamic nuclei in and around the posterior pole of the ventral posterior thalamic nucleus of a macaque monkey is presented. The concentrated focal zone of calbindin-immunoreactive fiber ramifications considered by others to form a specific pain and temperature relay nucleus is shown to be located entirely within the confines of the ventral posterior medial (VPM) nucleus. It contains a large population of calbindin-immunoreactive cells and overlaps a region of dense cell and fiber immunoreactivity for parvalbumin. In other parts of the ventral posterior complex, calbindin and parvalbumin immunoreactivity is complementary rather than co-extensive. It is unlikely that the zone of intense calbindin immunoreactivity in VPM forms the only thalamic relay for noxious thermal and mechanical inputs to the cerebral cortex.

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Corresponding author. Tel.: +1-530-757-8747; fax: +1-530-754-9136. E-mail address:ejones@ucdavis.edu (E.G. Jones).

Keywords

Delineation of thalamic nuclei immunoreactive for calcium-binding proteins in and around the posterior pole of the ventral posterior complex

  • Edward Jones (a1), Kristyna Lensky (a1) and Victor Chan (a1)

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