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Proceedings Paper

Effect of helium-neon laser on fast excitatory postsynaptic potential (f-EPSP) of neurons in the isolated rat superior cervical ganglia
Author(s): Mo Hua; He Ping; Mo Ning
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Paper Abstract

Single electrical stimulation of the cervical sympathetic trunk elicits in the ganglion cells an excitatory postsynaptic potential (EPSP) or multiple EPSPs of varying latencies, among which a fast excitatory postsynaptic potential (f-EPSP) is the main type of ganglionic transmission in the sympathetic neurons. In previous work, we studied the effects of Helium-Neon laser with wavelength 632.8 nm on membrane conductance of neurons with stable f- EPSP in isolated rat superior cervical ganglia. The aim of this study is to further measure the effect of Helium-Neon Laser with wavelength 632.8 nm on fast excitatory postsynaptic potential of postganglionic neurons in the isolated rate superior cervical ganglia by means of intracellular recording techniques. The neurons with fast excitatory postsynaptic potential were irradiated by different power densities (1 and 5 mW/cm2), pulse frequency of 1 Hz laser. Irradiated by the 2 mW/cm2 laser, the amplitude of the f-EPSP could augment (P<0.05) and even caused action potential (AP) at the end of the first 1-2 minute, the F-EPSP could descend and lasted for 3- 8 minutes later.

Paper Details

Date Published: 27 June 2002
PDF: 7 pages
Proc. SPIE 4617, Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical, (27 June 2002); doi: 10.1117/12.472529
Show Author Affiliations
Mo Hua, Guangxi Medical Univ. (China)
He Ping, Guangxi Medical Univ. (China)
Mo Ning, Guangxi Medical Univ. (China)

Published in SPIE Proceedings Vol. 4617:
Laser Tissue Interaction XIII: Photochemical, Photothermal, and Photomechanical
Steven L. Jacques; Donald Dean Duncan; Donald Dean Duncan; Sean J. Kirkpatrick; Sean J. Kirkpatrick; Andres Kriete; Andres Kriete, Editor(s)

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