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  4. Wide-field imaging of cortical neuronal activity with red-shifted functional indicators during motor task execution
 
research article

Wide-field imaging of cortical neuronal activity with red-shifted functional indicators during motor task execution

Montagni, Elena
•
Resta, Francesco
•
Conti, Emilia
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February 13, 2019
Journal Of Physics D-Applied Physics

Genetically encoded calcium indicators (GECIs) can be used to monitor the intracellular concentration of free calcium in populations of neurons. GECIs with long emission wavelengths are particularly attractive for deep tissue microscopy in vivo, and have the additional advantage of avoiding spectral overlap with commonly used neuronal actuators such as channelrhodopsin. The aim of this work is to evaluate the performances of four red-shifted GECIs (jRCaMP1a, jRCaMP1b, jRGECO1a, jRGECO1b) using both ex vivo and in vivo experimental techniques. Cortical neurons were infected with adeno-associated virus (AAV) expressing one of the red GECI variants. First we characterized the transfection ex vivo in terms of extension and intensity of the indicator. Next, we monitored the neuronal activity over the right cortical hemisphere of a jRCaMP1a-transfected mouse during a goal-directed motor task. To this aim, we combined wide-field fluorescence microscopy with a robotic device for simultaneous recording of cortical neuronal activity, force applied and forelimb position during task execution. Our results show that jRCaMP1a has sufficient sensitivity to monitor in vivo neuronal activity simultaneously over multiple functional areas, and can be successfully used to perform longitudinal imaging sessions in awake mice.

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Type
research article
DOI
10.1088/1361-6463/aaf26c
Web of Science ID

WOS:000453053800001

Author(s)
Montagni, Elena
Resta, Francesco
Conti, Emilia
Scaglione, Alessandro
Pasquini, Maria
Micera, Silvestro  
Mascaro, Anna Letizia Allegra
Pavone, Francesco Saverio
Date Issued

2019-02-13

Published in
Journal Of Physics D-Applied Physics
Volume

52

Issue

7

Article Number

074001

Subjects

Physics, Applied

•

Physics

•

wide-field microscopy

•

geci

•

calcium imaging

•

fluorescence

•

in vivo

•

cortex

Note

This is an open access article under the terms of the Creative Commons Attribution License

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
TNE  
Available on Infoscience
January 23, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/153989
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