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- W1988245729 abstract "Two fluorescent voltage-sensitive dyes, RH795 and DI-2-ANEPPQ, were compared forin vivomultisite optical recording from the gustatory insular cortex of the golden Syrian hamster, the first reported use of DI-2-ANEPPQ in a mammalian brain preparation. The exposed cortex of the anesthetized hamster was stained with a 500 μMsolution of either dye, and the cortical surface was imaged onto a 124-element photodiode array by an epifluorescence microscope equipped with a 2.5× objective (0.08 na) and appropriate excitation and emission filters for each dye. Background fluorescence was recorded with amplifiers in DC-coupled mode, and the bathing solution changed to one containing 100 μMbicuculline methiodide. Large, widespread epileptiform events were recorded optically, and with a surface electrode, within 2 min. Three experiments were carried out with each dye. The 10 recorded events from each experiment (and five detector records from each of these 10) having the largest signals were selected for comparison. Five measures were derived from the data: (1) The ratio of peak signal fluorescence to background fluorescence (ΔF/F), (2) signal-to-noise power ratio (S/N), (3) root mean square noise (RMS noise), (4) an amplitude ratio (AR) consisting of the signal height divided by RMS noise, and (5) the peak value of the surface electrode record (SER). The results indicate a twofold increase in ΔF/Fand a fivefold increase inS/N(twofold increase inAR) with DI-2-ANEPPQ. No significant difference was found between dyes in the RMS noise or SERs. In addition, signals did not decline detectably over time with DI-2-ANEPPQ, but declined about 25%/h with RH795." @default.
- W1988245729 created "2016-06-24" @default.
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- W1988245729 date "1997-02-01" @default.
- W1988245729 modified "2023-09-26" @default.
- W1988245729 title "Comparison of Fluorescent Voltage-Sensitive Dyes for Multisite Optical Recording in Hamster Cerebral Cortex by Measurement of Bicuculline-Induced Epileptiform Events" @default.
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- W1988245729 doi "https://doi.org/10.1006/nimg.1997.0258" @default.
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