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Abstract:

Electrodiagnostic abnormalities are well known to occur in syringomyelia although the findings are nonspecific. The objective of this work was to describe different types of spontaneous electromyographic (EMG) activity and reflex responses, which may be useful and more specific than conventional findings for the electrodiagnosis of syringomyelia. We studied 43 patients with syringomyelia by four-channel surface EMG and by recording the long- latency responses to distal stimulation of the median and tibial nerves. Continuous motor unit activity (CMUA) was found in 18 patients, synchronous motor unit potentials (SMUP) in 10, respiratory synkinesis (RS) in 5, and myokymic discharges in 4. Long-latency responses (LLR) with latencies ranging from 55 to 150 ms were found in 14 patients. Patients with syringomyelia thus show a wide variation of spontaneous EMG activity. An increase in excitability of spinal motor neurons is probably the basic underlying mechanism.

Registro:

Documento: Artículo
Título:Electrodiagnostic findings in syringomyelia
Autor:Nogués, M.A.; Stålberg, E.
Filiación:Dept. of Clinical Neurophysiology, Raul Carrea Inst. for Neurol. Res., Montañeses 2325, 1428 Buenos Aires, Argentina
Dept. of Clinical Neurophysiology, University Hospital, Uppsala, Sweden
Palabras clave:Chiari malformation; Electromyography (EMG); Long-latency responses (LLR); Spontaneous activity; Syringomyelia; adult; article; clinical article; electrodiagnosis; electromyogram; human; motor unit potential; muscle action potential; muscle excitation; nerve compression; priority journal; syringomyelia
Año:1999
Volumen:22
Número:12
Página de inicio:1653
Página de fin:1659
DOI: http://dx.doi.org/10.1002/(SICI)1097-4598(199912)22:12<1653::AID-MUS6>3.3.CO;2-5
Título revista:Muscle and Nerve
Título revista abreviado:Muscle Nerve
ISSN:0148639X
CODEN:MUNED
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0148639X_v22_n12_p1653_Nogues

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Citas:

---------- APA ----------
Nogués, M.A. & Stålberg, E. (1999) . Electrodiagnostic findings in syringomyelia. Muscle and Nerve, 22(12), 1653-1659.
http://dx.doi.org/10.1002/(SICI)1097-4598(199912)22:12<1653::AID-MUS6>3.3.CO;2-5
---------- CHICAGO ----------
Nogués, M.A., Stålberg, E. "Electrodiagnostic findings in syringomyelia" . Muscle and Nerve 22, no. 12 (1999) : 1653-1659.
http://dx.doi.org/10.1002/(SICI)1097-4598(199912)22:12<1653::AID-MUS6>3.3.CO;2-5
---------- MLA ----------
Nogués, M.A., Stålberg, E. "Electrodiagnostic findings in syringomyelia" . Muscle and Nerve, vol. 22, no. 12, 1999, pp. 1653-1659.
http://dx.doi.org/10.1002/(SICI)1097-4598(199912)22:12<1653::AID-MUS6>3.3.CO;2-5
---------- VANCOUVER ----------
Nogués, M.A., Stålberg, E. Electrodiagnostic findings in syringomyelia. Muscle Nerve. 1999;22(12):1653-1659.
http://dx.doi.org/10.1002/(SICI)1097-4598(199912)22:12<1653::AID-MUS6>3.3.CO;2-5