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Clinical use of the magnetic stimulator in the investigation of peripheral conduction time.
Muscle Nerve. 1990 May; 13(5):396-406.MN

Abstract

The application of rapidly changing magnetic fields (magnetic stimulation) over the neck or lower back elicits EMG responses in the muscles of the arm or leg respectively. Such responses have stable onset latencies but their amplitudes vary depending on the position of the coil over the neck or lower back. Supramaximal responses could not be obtained. Comparison of onset latencies with estimates of peripheral conduction time using a conventional F-wave technique suggest that the site of excitation of the motor axons is about 1.3 msec conduction time distal to the cervical motoneurons and 3 msec distal to the lumbosacral motoneurons. Response configuration after paravertebral magnetic stimulation was similar to that of the standard electrically evoked M-wave in the small hand muscles but not in lower limb muscles. Responses in lower limb muscles after paravertebral magnetic stimulation may consist of additional F-wave and H-reflex components. The possible clinical role of paravertebral magnetic stimulation in the investigation of peripheral and central motor pathways is discussed in the light of these findings.

Authors+Show Affiliations

Department of Neurology, University of Düesseldorf, Federal Republic of Germany.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

2161079

Citation

Britton, T C., et al. "Clinical Use of the Magnetic Stimulator in the Investigation of Peripheral Conduction Time." Muscle & Nerve, vol. 13, no. 5, 1990, pp. 396-406.
Britton TC, Meyer BU, Herdmann J, et al. Clinical use of the magnetic stimulator in the investigation of peripheral conduction time. Muscle Nerve. 1990;13(5):396-406.
Britton, T. C., Meyer, B. U., Herdmann, J., & Benecke, R. (1990). Clinical use of the magnetic stimulator in the investigation of peripheral conduction time. Muscle & Nerve, 13(5), 396-406.
Britton TC, et al. Clinical Use of the Magnetic Stimulator in the Investigation of Peripheral Conduction Time. Muscle Nerve. 1990;13(5):396-406. PubMed PMID: 2161079.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Clinical use of the magnetic stimulator in the investigation of peripheral conduction time. AU - Britton,T C, AU - Meyer,B U, AU - Herdmann,J, AU - Benecke,R, PY - 1990/5/1/pubmed PY - 1990/5/1/medline PY - 1990/5/1/entrez SP - 396 EP - 406 JF - Muscle & nerve JO - Muscle Nerve VL - 13 IS - 5 N2 - The application of rapidly changing magnetic fields (magnetic stimulation) over the neck or lower back elicits EMG responses in the muscles of the arm or leg respectively. Such responses have stable onset latencies but their amplitudes vary depending on the position of the coil over the neck or lower back. Supramaximal responses could not be obtained. Comparison of onset latencies with estimates of peripheral conduction time using a conventional F-wave technique suggest that the site of excitation of the motor axons is about 1.3 msec conduction time distal to the cervical motoneurons and 3 msec distal to the lumbosacral motoneurons. Response configuration after paravertebral magnetic stimulation was similar to that of the standard electrically evoked M-wave in the small hand muscles but not in lower limb muscles. Responses in lower limb muscles after paravertebral magnetic stimulation may consist of additional F-wave and H-reflex components. The possible clinical role of paravertebral magnetic stimulation in the investigation of peripheral and central motor pathways is discussed in the light of these findings. SN - 0148-639X UR - https://www.unboundmedicine.com/medline/citation/2161079/Clinical_use_of_the_magnetic_stimulator_in_the_investigation_of_peripheral_conduction_time_ DB - PRIME DP - Unbound Medicine ER -