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Your search keyword '"Kakigi, Ryusuke"' showing total 31 results
Start Over Author "Kakigi, Ryusuke" Journal neuroscience letters
31 results on '"Kakigi, Ryusuke"'

30. Conduction velocity of the spinothalamic tract in humans as assessed by CO2laser stimulation of C-fibers

Author

Qiu, Yunhai, Inui, Koji, Wang, Xiaohong, Tran, Tuan Diep, and Kakigi, Ryusuke

Abstract

We measured the conduction velocity (CV) of C-fibers in the spinothalamic tract (STT) following stimulation with a CO2laser using a new method. We delivered non-painful laser pulses to tiny areas of the skin overlying the vertebral spinous processes at different levels from the 7thcervical (C7) to the 12ththoracic (T12), and recorded cerebral evoked potentials in 11 healthy men. We used the term ‘ultra-late laser evoked potentials’ (ultra-late LEPs), since the peak latency was much longer than that for conventional LEPs related to Aδ-fibers following painful laser stimulation (late LEPs). The mean CV of C-fibers in the STT was 2.2±0.6 m/s, which was significantly lower than the CV of the Aδ-fibers (10.0±4.5 m/s). This technique is novel and simple, and should be useful as a diagnostic tool for assessing the level of spinal cord lesions.

Published
2001
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31. Microneurographic study of C fiber discharges induced by CO2 laser stimulation in humans

Author

Qiu, Yunhai, Fu, Qi, Wang, Xiaohong, Tran, Tuan Diep, Inui, Koji, Iwase, Satoshi, and Kakigi, Ryusuke

Subjects
*ELECTROENCEPHALOGRAPHY, *LASER beams, *CEREBRAL cortex, *SKIN diseases
Abstract

We investigated C-fiber discharges and cerebral potentials evoked by weak CO2 laser beams applied to a tiny skin area in five healthy subjects. Microneurography was performed from the peroneal nerve in the right popliteal area. Cerebral potentials were recorded from the Cz electrode referred to linked earlobes. The mean conduction velocity of five stable single units was 1.1±0.3 m/s. The mean latency of the positive peak of cerebral potentials was 1327.4±46.2 ms. These findings indicated that this new stimulation method selectively activated C-fiber nociceptors of the skin. [Copyright &y& Elsevier]

Published
2003
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