Abstract

The aim of this study is to further measure the effect of 632.8-nm helium-neon laser on fast excitatory postsynaptic potential (f-EPSP) of postganglionic neurons in isolated rat superior cervical ganglia by means of intracellular recording techniques. The neurons with f-EPSP were irradiated by different power densities (1-5 mW/cm2) laser. Irradiated by the 2-mW/cm2 laser, the amplitude of the f-EPSP could augment (P<0.05, paired t test) and even cause action potential at the end of the first 1-2 minutes, the f-EPSP could descend and last for 3-8 minutes. But the amplitude of the f-EPSP of neurons irradiated by the 5-mW/cm2 laser could depress for the irradiating periods. The results show that: 1) the variation of the amplitude of f-EPSP caused by laser is power density-dependent and time-dependent; 2) there exist the second-order phases in the interaction of the helium-neon laser with neurons. These findings may provide certain evidence in explanation of the mechanisms of clinical helium-neon laser therapy.

© 2005 Chinese Optics Letters

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  2. T. C. Liu and S. H. Liu, Chin. J. Laser Med. Sury. 6, 125 (1997).
  3. H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).
  4. N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).
  5. N. Mo and N. J. Dun, Neuroscience Lett. 64, 263 (1986).
  6. N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).
  7. M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).
  8. R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

2002

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

1997

T. C. Liu and S. H. Liu, Chin. J. Laser Med. Sury. 6, 125 (1997).

1994

Q. M. Luo, X. D. Liu, and Z. G. Li, Chin. J. Laser Med. Sury. 3, 39 (1994).

1993

M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).

1992

R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

1986

N. Mo and N. J. Dun, Neuroscience Lett. 64, 263 (1986).

1985

N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).

1984

N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).

Derkach, V.

R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

Dun, N. J.

N. Mo and N. J. Dun, Neuroscience Lett. 64, 263 (1986).

N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).

N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).

Evens, R. J.

R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

He, P.

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

Henry, J. L.

M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).

Jiang, Z. G.

N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).

Karczmar, A. G.

N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).

Koninck, Y. de

M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).

Li, Z. G.

Q. M. Luo, X. D. Liu, and Z. G. Li, Chin. J. Laser Med. Sury. 3, 39 (1994).

Liang, A. X.

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

Liu, S. H.

T. C. Liu and S. H. Liu, Chin. J. Laser Med. Sury. 6, 125 (1997).

Liu, T. C.

T. C. Liu and S. H. Liu, Chin. J. Laser Med. Sury. 6, 125 (1997).

Liu, X. D.

Q. M. Luo, X. D. Liu, and Z. G. Li, Chin. J. Laser Med. Sury. 3, 39 (1994).

Luo, Q. M.

Q. M. Luo, X. D. Liu, and Z. G. Li, Chin. J. Laser Med. Sury. 3, 39 (1994).

Mo, H.

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

Mo, N.

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

N. Mo and N. J. Dun, Neuroscience Lett. 64, 263 (1986).

N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).

N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).

Salter, M. W.

M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).

Surprenant, A.

R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

Acta Laser Biology Sin.

H. Mo, P. He, A. X. Liang, and N. Mo, Acta Laser Biology Sin. 11, 369 (2002).

Chin. J. Laser Med. Sury.

Q. M. Luo, X. D. Liu, and Z. G. Li, Chin. J. Laser Med. Sury. 3, 39 (1994).

T. C. Liu and S. H. Liu, Chin. J. Laser Med. Sury. 6, 125 (1997).

J. Physiol

N. J. Dun, Z. G. Jiang, and N. Mo, J. Physiol 357, 37 (1984).

Nature

R. J. Evens, V. Derkach, and A. Surprenant, Nature 357, 503 (1992).

Neuropharmacology

N. Mo, N. J. Dun, and A. G. Karczmar, Neuropharmacology 24, 1093 (1985).

Neuroscience Lett.

N. Mo and N. J. Dun, Neuroscience Lett. 64, 263 (1986).

Prog. Neurobiol.

M. W. Salter, Y. de Koninck, and J. L. Henry, Prog. Neurobiol. 41, 125 (1993).

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