Infrared laser had been proved their effectiveness on injury repairing, synchronize embryos and neural regulation etc. Pulsed laser with wavelengths < ~1.5 μm was used in controlling nerves in vitro, such as stimulation or block action potentials. Theoretical analysis demonstrated that whether enhancement or inhibition could be ascribed to the thermal effect induced by the pulsed laser. A membrane capacitance mediation mechanism had been proved to act as a chromophore in the mediation this thermal effect with the cell function. Here, we explored a continuous infrared laser irradiation situation, which was a case in clinic. A continuous near infrared laser with a wavelength centered at 980nm was employed to irradiate a neuron cell in vitro. And a patch clamp technique was employed to record a whole cell current. The whole cell current was formed by a compensated capacitance current, a rapid voltage-dependent inward sodium current, and a slowly voltage-dependent outward-rectifier potassium current. After a 36s irradiation, the potassium current was changed not that much, but the sodium current was decreased in its peak current. We analyzed the compensated capacitance current and found that the infrared irradiation decreased the membrane capacitance also. Analysis demonstrated that this can also be related to temperature raising gradient. Our results support that a near infrared continuous laser change neurons activities by reducing its membrane capacitance.
In this article, a novel instance is introduced in optical-fiber white light interferometer experiment. In the experiment of
measurement the thickness of a piece of glass by optical-fiber white light interferometer, five while not one interference
signal were found. The wrong result could be concluded because of more interference signal come out in the
measurement of optical fiber sensor technique based on the white-light interferometer.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.