简介：
Overview
This article describes a method for measuring neuronal activity in Thy1-GCaMP6s transgenic mice using dual optical windows and two-photon microscopy. The technique allows for prolonged in vivo recordings of neural activity across bilateral primary somatosensory cortices.
Key Study Components
Area of Science
- Neuroscience
- Neuroimaging
- Calcium imaging
Background
- Two-photon microscopy enables simultaneous detection of activity in large neuronal populations.
- The method is applicable for studying activity patterns in specific neuronal populations.
- Thy1-GCaMP6s mice are used for visualizing calcium dynamics in neurons.
- Recording techniques can be applied to assess cortical activity after injuries.
Purpose of Study
- To provide a detailed protocol for installing cranial windows for in vivo imaging.
- To enable the quantification of spontaneous calcium activity in cortical neurons.
- To facilitate the study of neuronal dynamics in living brain tissue.
Methods Used
- Preparation of optical windows and surgical procedures for craniotomy.
- Installation of optical windows over the primary somatosensory cortex.
- Two-photon microscopy for imaging calcium dynamics.
- Analysis of fluorescence changes to quantify neuronal activity.
Main Results
- Stable imaging of dendritic branches and spines over time.
- Ability to record from 100 to 200 neurons per day.
- Quantification of intracellular calcium transients in layer five pyramidal neurons.
- Method applicable for studying cortical plasticity post-injury.
Conclusions
- The dual optical window method allows for effective in vivo calcium imaging.
- This technique enhances the understanding of neuronal activity in the cortex.
- It provides a valuable tool for investigating brain function and plasticity.
What is the purpose of using dual optical windows?
Dual optical windows allow for simultaneous imaging of neuronal activity in both hemispheres of the brain.
How long can recordings be made using this method?
Recordings can be made for prolonged periods, allowing for stable calcium imaging over days.
What type of mice are used in this study?
Thy1-GCaMP6s transgenic mice are used for visualizing calcium dynamics in neurons.
What are the implications of this imaging technique?
The technique can be used to study neuronal activity patterns and plasticity in response to injuries.
What is the significance of two-photon microscopy?
Two-photon microscopy allows for deep tissue imaging and simultaneous recording from multiple neurons.
How is the optical window installed?
The optical window is installed over a craniotomy, resting on the dura and sealed with glue and dental cement.
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