title: Prominent cauda equina involvement in patients with chronic inflammatory demyelinating polyradiculoneuropathy.
abstract: In chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), it has not been well known which segment of the peripheral nerves, distal or proximal, is more often involved in electrophysiological examination. This study compares nerve conductions at proximal segments with those at distal segments in 11 patients with CIDP. To obtain cauda euqina conduciton time (CECT), compound muscle action potentials (CMAPs) were elicited by magnetic stimulation using a MATS coil from the abductor hallucis muscle. CECT was prolonged in 9 patients (81.8%), whereas the ankle-knee conduction was delayed in 4 (36.4%). The proximal segments are more frequently involved than the distal segments in this disorder.
authors.affiliation: Department of Neurology, Graduate School of Medicine, the University of Tokyo, Japan. hideyukimatsumoto@mail.goo.ne.jp
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Matsumoto
authors.forename: Ritsuko
authors.initials: R
authors.lastname: Hanajima
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Terao
authors.forename: Akihiro
authors.initials: A
authors.lastname: Yugeta
authors.forename: Masashi
authors.initials: M
authors.lastname: Hamada
authors.forename: Yuichiro
authors.initials: Y
authors.lastname: Shirota
authors.forename: Shinya
authors.initials: S
authors.lastname: Ohminami
authors.forename: Setsu
authors.initials: S
authors.lastname: Nakatani-Enomoto
authors.forename: Shoji
authors.initials: S
authors.lastname: Tsuji
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Ugawa
mesh_terms: D000200:Action Potentials / Q000502:physiology / Q000528:radiation effects; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002420:Cauda Equina / Q000473:pathology* / Q000503:physiopathology / Q000528:radiation effects; D003952:Diagnostic Imaging / Q000379:methods*; D018450:Disease Progression; D004574:Electromagnetic Fields; D019054:Evoked Potentials, Motor / Q000502:physiology / Q000528:radiation effects; D005260:Female; D006801:Humans; D007866:Leg / Q000294:innervation / Q000503:physiopathology; D008280:Magnetics / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018482:Muscle, Skeletal / Q000294:innervation / Q000503:physiopathology; D010525:Peripheral Nerves / Q000503:physiopathology / Q000528:radiation effects; D020277:Polyradiculoneuropathy, Chronic Inflammatory Demyelinating / Q000473:pathology* / Q000503:physiopathology; D011128:Polyradiculopathy / Q000473:pathology* / Q000503:physiopathology; D011237:Predictive Value of Tests