Electromyography and clinical neurophysiology
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Electromyogr Clin Neurophysiol · Dec 1995
Comparative StudyPosterior tibial somatosensory evoked potentials a comparative study of responses elicited by transcutaneous and percutaneous stimulation at the popliteal fossa.
Nine healthy volunteers underwent posterior tibial nerve stimulation at the popliteal fossa with recordings of averaged potentials being taken from the lumbar spine and cortex. Stimulation was attempted in all subjects both transcutaneously and percutaneously. A comparison of the responses to the two stimulating methods was made.
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Electromyogr Clin Neurophysiol · Dec 1995
Sympathetic skin response: correlation with autonomic and somatic involvement in multiple sclerosis.
The sympathetic skin response (SSR) was studied in 63 multiple sclerosis (MS) patients, 54 with clinical definite and 9 with clinical probable form. The test was recorded from palms and soles and induced by electric stimulus. SSR was abnormal, absent or mildly delayed, in 26 patients (41%). ⋯ It is concluded that SSR is a simple test for a dynamic evaluation of MS, well correlated with the degree of disability, able to detect subclinical lesions in the sympathetic tracts, but with slight localizing value. It has also a low sensitivity for autonomic impairment related only with the bladder dysfunction. These facts exclude the SSR as a primary diagnostic tool in MS.