Visualization of incomplete conduction block by neuromagnetic recording.

Visualization of incomplete conduction block by neuromagnetic recording. Research Abstract Details 

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Visualization of incomplete conduction block by neuromagnetic recording. Abstract Text:

OBJECTIVE: We previously reported on evoked compound action magnetic fields (CAFs) in isolated sciatic nerves with complete conduction block. In this study, we examined evoked CAFs of the nerve with incomplete conduction block, which is clinically common. METHODS: Rabbits' isolated nerves were electrically stimulated in a chamber containing Ringer's solution. Compound action potentials (CAPs) and CAFs were recorded before and after the incomplete conduction block induced by a vascular clip. The positions of the lesion were estimated by dipole localization. RESULTS: Before the nerve clipping, magnetic contour maps showed CAFs with a characteristic quadrupolar pattern. After the clipping, CAFs attenuated in the amplitude and decelerated through the lesion. Estimated position of the lesion was 0.12+/-3.23 mm (mean+/-SD, n=10) assuming that the real position of the clip was 0 mm. CONCLUSIONS: The time-course of changes of CAFs in the incomplete conduction block was visualized by magnetic contour maps, and the lesions were closely localized focusing on the velocity change of the leading dipole. SIGNIFICANCE: The neural conduction with incomplete conduction block was visualized and the lesion was closely localized by neuromagnetic recordings.

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Visualization of incomplete conduction block by neuromagnetic recording. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Clinical neurophysiology : official journal of the

VOLUME: 115

Page Numbers: 2113-22

Journal Abbreviation: Clin Neurophysiol

ISSN: 1388-2457

DAY: 10

MONTH: Sep

YEAR: 2004

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LANGUAGE: eng

NlmUniqueID: 100883319

Visualization of incomplete conduction block by neuromagnetic recording. Keywords Mesh Terms:

KEYWORDS: Surgical Instruments

MESH TERMS: physiology

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Grant and Affiliation Information for Visualization of incomplete conduction block by neuromagnetic recording.

AFFILIATION: Department of Frontier Surgical Therapeutics, Section of Orthopedic and Spinal Surgery, Division of Advanced Therapeutical Sciences, Graduate School of Tokyo Medical and Dental University, Japan. fukuoka.orth@tmd.ac.jp

Country: Netherlands

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MEDLINETA: Clin Neurophysiol

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