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  • Title: Calretinin-immunoreactive neurons in the human thalamus.
    Author: Fortin M, Asselin MC, Gould PV, Parent A.
    Journal: Neuroscience; 1998 May; 84(2):537-48. PubMed ID: 9539224.
    Abstract:
    The distribution of the calcium-binding protein calretinin in the thalamus of normal human individuals was studied with immunohistochemistry. Calretinin immunoreactivity was weak in the geniculate bodies and in nuclei of the ventral and posterior groups, moderate in the reticular nucleus and in nuclei of the anterior, medial, and lateral groups, and strong in nuclei of the midline group and anterior intralaminar nuclei. The mediodorsal nucleus was unique among thalamic nuclei because it contained a wide variety of intensely immunostained perikarya embedded in a moderately-labelled neuropil. The reticular nucleus displayed several small and uniformly distributed neuronal clusters composed of immunostained perikarya lying in a moderately-labelled neuropil. Intense and uniform immunostaining was observed in all midline nuclei and in the anterior intralaminar nuclei, including the paracentral and central lateral nuclei. These nuclei, which harboured numerous intensely-stained perikarya lying in a dense immunoreactive neuropil, were the most strongly-immunoreactive structures of the entire human thalamus. At the level of the posterior intralaminar nuclei, the central median nucleus was virtually free of immunostaining whereas the parafascicular nucleus was moderately labelled. The nucleus submedius located just beneath the central median/parafascicular complex displayed a very intense calretinin immunostaining. This study has provided evidence for the presence of the protein calretinin in the human thalamus. The pattern of distribution of calretinin, as delineated in the present study, suggests that this calcium-binding protein may participate in various subcortical and cortical thalamic systems involved in the modulation of emotional and motivational states.
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