Prominent cauda equina involvement in patients with chronic inflammatory demyelinating polyradiculoneuropathy.
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.
Matsumoto
Hideyuki
H
Department of Neurology, Graduate School of Medicine, the University of Tokyo, Japan. hideyukimatsumoto@mail.goo.ne.jp
Hanajima
Ritsuko
R
Terao
Yasuo
Y
Yugeta
Akihiro
A
Hamada
Masashi
M
Shirota
Yuichiro
Y
Ohminami
Shinya
S
Nakatani-Enomoto
Setsu
S
Tsuji
Shoji
S
Ugawa
Yoshikazu
Y
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