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The effect of spasticity on cortical somatosensory-evoked potentials : Changes of cortical somatosensory-evoked potentials after botulinum toxin type A injection

PARK ES; PARK CI; KIM DY
ARCH PHYS MED REHABIL , 2002, vol. 83, n° 11, p. 1592-1596
Doc n°: 106931
Localisation : Documentation IRR
Descripteurs : AK4 - POTENTIELS EVOQUES, AD32 - SPASTICITE
Article consultable sur : http://www.archives-pmr.org

Objective: To evaluate the changes in cortical somatosensory-evoked potentials (SEPs) after botulinum toxin type A injection to determine what effect spasticity has on cortical SEPs. Design: Intervention study and before-after trial. Setting: University-affiliated hospital in Korea. Participants: Twelve children with spastic hemiplegic cerebral palsy (CP), 7 children with spastic diplegic CP, and 8 patients with traumatic brain injury. Intervention: All participants had botulinum toxin type A injected into the muscles of the spastic limb. Main Outcome Measures: SEPs were recorded before and 7 days after the botulinum toxin type A injection. Spasticity of the affected spastic limb was also measured. The short latency and amplitude of waves in SEPs were measured. The SEP results were divided into 3 groups: flat (no evoked potential), abnormal (evoked but delayed in latency), and normal (clear waveform with normal latency). Results: The normal response of cortical SEP increased after injection. The SEPs exhibited more frequent improvement in the limbs, with greater improvement of spasticity in grade (>1.0 grade) and in patients of younger age (<3y) after injection (P<.05). Conclusion: The observed improvement of cortical SEPs with associated reduction of spasticity that occurred after the botulinum toxin type A injection indicates that spasticity itself can be considered a factor affecting cortical SEPs.

Langue : ANGLAIS

Identifiant basis : 2003225012

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