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Combined two-photon imaging, electrophysiological, and anatomical investigation
of the human neocortex in vitro
#MMPMID26157969
Kerekes BP
; Tóth K
; Kaszás A
; Chiovini B
; Szadai Z
; Szalay G
; Pálfi D
; Bagó A
; Spitzer K
; Rózsa B
; Ulbert I
; Wittner L
Neurophotonics
2014[Jul]; 1
(1
): 011013
PMID26157969
show ga
Spontaneous synchronous population activity (SPA) can be detected by
electrophysiological methods in cortical slices of epileptic patients, maintained
in a physiological medium in vitro. In order to gain additional spatial
information about the network mechanisms involved in the SPA generation, we
combined electrophysiological studies with two-photon imaging. Neocortical slices
prepared from postoperative tissue of epileptic and tumor patients were
maintained in a dual perfusion chamber in a physiological incubation medium. SPA
was recorded with a 24-channel extracellular linear microelectrode covering all
neocortical layers. After identifying the electrophysiologically active regions
of the slice, bolus loading of neuronal and glial markers was applied on the
tissue. SPA-related [Formula: see text] transients were detected in a large
population of neighboring neurons with two-photon microscopy, simultaneous with
extracellular SPA and intracellular whole-cell patch-clamp recordings. The
intracellularly recorded cells were filled for subsequent anatomy. The cells were
reconstructed in three dimensions and examined with light- and transmission
electron microscopy. Combining high spatial resolution two-photon [Formula: see
text] imaging techniques and high temporal resolution extra- and intracellular
electrophysiology with cellular anatomy may permit a deeper understanding of the
structural and functional properties of the human neocortex.