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- W2014355239 abstract "The mammalian striatum is a heterogeneous structure characterized by striosomes and matrix. The synaptic organization of the striatum has been described previously in various mammalian species including human; however, potential ultrastructural differences in striosomal organization have not been well studied. Samples (n = 7) of striatal tissue were obtained from the Maryland Brain Collection (mean age, 37.7 +/- 9.4 years; and mean PMI, 5.3 +/- 1.4 hours). Tissue was prepared for calbindin immunocytochemistry to identify striosomal (patch) and extrastriosomal matrix (matrix) compartments and subsequently prepared for electron microscopy. Synaptic density was determined, using stereologic methods, for all synapses combined and for various subsets of synapses such as asymmetric, symmetric, axospinous, axodendritic, and perforated in the patch and matrix of the caudate (CP, CM) and putamen (PP, PM). An ANOVA revealed significant between-group (CP, CM, PP, PM) differences (P < 0.05) for the following types of synapses: total combined, asymmetric, axospinous, and asymmetric axospinous. Each of these four types was significantly increased in density in the CP vs the PP, whereas the matrix (CM vs PM) showed no significant differences in density in these or other synapses. In the caudate (CP vs CM), the synaptic density of the types of synapses studied did not vary significantly between the patch and the matrix. In the putamen, the matrix (PM) had higher synaptic densities than that of the patches (PP) for total synapses, symmetric dendritic, and perforated. These data show that the patch and matrix compartments are heterogeneous at the ultrastructural level, imparting another level of complexity to the striatum-a fact that should be taken into consideration when studying diseases of this brain region at the electron microscopic level." @default.
- W2014355239 created "2016-06-24" @default.
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- W2014355239 date "2002-09-20" @default.
- W2014355239 modified "2023-09-25" @default.
- W2014355239 title "The ultrastructural organization of the patch matrix compartments in the human striatum" @default.
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- W2014355239 doi "https://doi.org/10.1002/cne.10351" @default.
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