动作电位传播过程中瞬态结构变化的深度分辨测量。
Depth-resolved measurement of transient structural changes during action potential propagation.
作者信息
Akkin Taner, Joo Chulmin, de Boer Johannes F
机构信息
Harvard Medical School and Wellman Center for Photomedicine at Massachusetts General Hospital, Boston, Massachusetts 02114, USA.
出版信息
Biophys J. 2007 Aug 15;93(4):1347-53. doi: 10.1529/biophysj.106.091298. Epub 2007 May 25.
Abstract
We report noncontact optical measurement of fast transient structural changes in the crustacean nerve during action potential propagation without the need for exogenous chemicals or reflection coatings. The technique, spectral domain optical coherence tomography, provides real-time cross-sectional images of the nerve with micron-scale resolution to select a specific region for functional assessment and interferometric phase sensitivity for subnanometer-scale motion detection. Noncontact optical measurements demonstrate nanometer-scale transient movement on a 1-ms timescale associated with action potential propagation in crayfish and lobster nerves.
摘要
我们报告了在无脊椎动物神经动作电位传播过程中，对其快速瞬态结构变化进行的非接触式光学测量，无需使用外源化学物质或反射涂层。该技术，即光谱域光学相干断层扫描，可提供具有微米级分辨率的神经实时横截面图像，以选择特定区域进行功能评估，并具有干涉相位灵敏度用于亚纳米级运动检测。非接触式光学测量显示，在小龙虾和龙虾神经中，与动作电位传播相关的纳米级瞬态运动发生在1毫秒的时间尺度上。
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