Summary
The distribution of glutamic acid decarboxylase (GAD)-like immunoreactivity in the lateral geniculate nucleus (LGN) of the human adult was studied in vibratome sections (50–60 urn thick) using the avidinbiotin-peroxidase method. The tissue was obtained at autopsy from five individuals without any known neurological disorders. Only few GAD-immunoreactive neurons were present in the layers of the LGN, even less in the interlaminar zones. The numerical density of GAD-immunoreactive neurons and puncta (probably synaptic boutons and/or cross sectioned cell processes) in the magnocellular layers was larger than in the parvocellular layers. Furthermore, no striking differences between the individual parvocellular layers were noted. The immunoreactive somata were polygonal or triangular, occasionally pear-shaped, and ranged in size from 15 to 25 urn. They gave off two to four short, thick, straight primary dendrites. A preferred orientation of dendrites was not recognized. After bleaching the chromogen 4-chloro-1-naphthol and staining for lipofuscin pigment granules and basophilic material, 254 unequivocally relocated GAD-immunoreactive nerve cells could be classified as belonging to the lipofuscin pigment granules-containing class of interneurons.
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Zinner-Feyerabend, M., Braak, E. Glutamic acid decarboxylase (GAD)-immunoreactive structures in the adult human lateral geniculate nucleus. Anat Embryol 183, 111–117 (1991). https://doi.org/10.1007/BF00174391
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DOI: https://doi.org/10.1007/BF00174391