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Combining in vivo volume-controlled pressure microejection with extracellular unit recording
H Akaoka1, C F Saunier, K Chergui
1INSERM U171 and CNRS URA 1195, Centre Hospitalier Lyon-Sud, Pierre-Bénite, France.
Journal of Neuroscience Methods
|April 1, 1992
Summary
This study introduces a novel method combining extracellular recording with pressure ejection for precise nanoliter volume quantification. The technique utilizes meniscus movement measurement for accurate volume determination in neurobiological research.
Area of Science:
- Neuroscience
- Biophysics
- Instrumentation
Background:
- Accurate quantification of ejected volumes is crucial for in vivo neurobiological experiments.
- Existing methods may lack precision or require complex setups.
Purpose of the Study:
- To develop and validate a method for precise microvolume quantification.
- To integrate extracellular single-unit recording with pressure ejection technology.
Main Methods:
- Combining extracellular single-unit recording with pressure ejection.
- Measuring meniscus movement for volume determination.
- Affixing a recording electrode to a calibrated narrow-bore ejection pipette.
Main Results:
- Achieved high-quality extracellular recordings.
- Enabled precise determination of ejected volumes in the nanoliter range.
- Demonstrated successful optimization of the combined technique.
Conclusions:
- The developed method allows for accurate microvolume quantification.
- This technique enhances precision in neurobiological experiments involving pressure ejection.
- Optimized integration of recording and ejection provides reliable experimental control.