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Descending Control of Muscles in Patients with Cervical Dystonia by Marina A.J. Tijssen; Alex Münchau; John F. Marsden; Andrew Lees; Kailash P. Bhatia; Peter Brown is a Medicine article available to read on EtoBox.

What is Descending Control of Muscles in Patients with Cervical Dystonia about?

It was reported recently that specific features in the frequency analysis of electromyographic (EMG) activity in the sternocleidomastoid (SCM) and splenius (SPL) muscles were able to distinguish between rotational idiopathic cervical dystonia (CD) and voluntary torticollis in individual subjects. Those with CD showed an abnormal drive to muscles at 5 to 7 Hz and an absence of the normal 10 to 12 Hz peak in the autospectrum of SPL. We sought to determine whether the same abnormalities in the frequency domain are found in complex CD, in which the head is displaced in more than two planes. EMG activity was recorded in the SCM, SPL, trapezius, and levator scapulae muscles bilaterally in 10 patients with complex CD. Frequency analysis of EMG was compared with conventional clinical and polymyographic assessment. The autospectrum of SPL during free dystonic contraction showed an absence of a significant peak at 10 to 12 Hz in 8 of the 10 patients. The presence of a 5 to 7 Hz frequency drive showed a significant association with muscle pairs determined as dystonic by means of polymyography (P < 0.005). The neck posture predicted blindly, based on the low-frequency drive, correlated signifi

Who reads Descending Control of Muscles in Patients with Cervical Dystonia?

Author

Marina A.J. Tijssen; Alex Münchau; John F. Marsden; Andrew Lees; Kailash P. Bhatia; Peter Brown

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0885-3185)

Published

2002

Language

EN

Field

Medicine (Health Sciences)