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Published in: Brain Structure and Function 6/2022

Open Access 28-05-2022 | Methods Paper

Application of the mirror technique for block-face scanning electron microscopy

Authors: Petra Talapka, Bence Béla Bába, Zoltán Mészár, Réka Eszter Kisvárday, Zsolt Kocsis, Mohit Srivastava, Zoltán Kisvárday

Published in: Brain Structure and Function | Issue 6/2022

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Abstract

The mirror technique adapted for electron microscopy allows correlating neuronal structures across the cutting plane of adjoining light microscopic sections which, however, have a limited thickness, typically less than 100 µm (Talapka et al. in Front Neuroanat, 2021, https://​doi.​org/​10.​3389/​fnana.​2021.​652422). Here, we extend the mirror technique for tissue blocks in the millimeter range and demonstrate compatibility with serial block-face electron microscopy (SBEM). An essential step of the methodological improvement regards the recognition that unbound resin must be removed from the tissue surface to gain visibility of surface structures. To this, the tissue block was placed on absorbent paper during the curing process. In this way, neuronal cell bodies could be unequivocally identified using epi-illumination and confocal microscopy. Thus, the layout of cell bodies which were cut by the sectioning plane can be correlated with the layout of their complementary part in the adjoining section processed for immunohistochemistry. The modified mirror technique obviates the spatial limit in investigating synaptology of neurochemically identified structures such as neuronal processes, dendrites and axons.
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Metadata
Title
Application of the mirror technique for block-face scanning electron microscopy
Authors
Petra Talapka
Bence Béla Bába
Zoltán Mészár
Réka Eszter Kisvárday
Zsolt Kocsis
Mohit Srivastava
Zoltán Kisvárday
Publication date
28-05-2022
Publisher
Springer Berlin Heidelberg
Published in
Brain Structure and Function / Issue 6/2022
Print ISSN: 1863-2653
Electronic ISSN: 1863-2661
DOI
https://doi.org/10.1007/s00429-022-02506-w

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