1. Visualization of Dynamic Sub-microsecond Changes in Membrane Potential
- Author
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Hope T. Beier, Caleb C. Roth, Anna V. Sedelnikova, Bennett L. Ibey, and Joel N. Bixler
- Subjects
Membrane potential ,Chemical process ,0303 health sciences ,Computer science ,Cell Membrane ,Optical Imaging ,Biophysics ,Direct observation ,Articles ,CHO Cells ,Membrane Potentials ,Visualization ,Living systems ,03 medical and health sciences ,Microsecond ,Cricetulus ,0302 clinical medicine ,Membrane ,Cricetinae ,Animals ,Electric pulse ,Biological system ,030217 neurology & neurosurgery ,030304 developmental biology - Abstract
Direct observation of rapid membrane potential changes is critical to understand how complex neurological systems function. This knowledge is especially important when stimulation is achieved through an external stimulus meant to mimic a naturally occurring process. To enable exploration of this dynamic space, we developed an all-optical method for observing rapid changes in membrane potential at temporal resolutions of ∼25 ns. By applying a single 600-ns electric pulse, we observed sub-microsecond, continuous membrane charging and discharging dynamics. Close agreement between the acquired results and an analytical membrane-charging model validates the utility of this technique. This tool will deepen our understanding of the role of membrane potential dynamics in the regulation of many biological and chemical processes within living systems.
- Published
- 2019