Abstract:
:If anti-GM1 antibody plays a role in the axonal damage in Guillain-Barré syndrome, the common entrapment sites may be preferentially involved with evidence of axonal dysfunction. To assess this hypothesis, we studied nerve conduction across the cubital tunnel in 44 patients. Abnormal amplitude reduction of compound muscle action potentials (CMAPs) was found in 45% of 20 immunoglobulin G (IgG) anti-GM1-positive and in 29% of 24 anti-GM1-negative patients. The time course and sequel were distinct between the two groups. In the former group, the amplitude reduction was prominent in weeks 1 to 2 and was followed by a decrease in distal CMAPs (axonal degeneration) or an increase in proximal CMAPs (resolution of conduction block). In contrast, anti-GM1-negative patients showed slower resolution with temporal dispersion. In anti-GM1-positive cases, amplitude reduction at the common entrapment site is frequent and may reflect wallerian degeneration or physiological conduction block at the nodes of Ranvier, both suggesting axonal involvement.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Kuwabara S,Mori M,Ogawara K,Mizobuchi K,Hattori T,Koga M,Yuki Ndoi
10.1002/(sici)1097-4598(199907)22:7<840::aid-mus5>subject
Has Abstractpub_date
1999-07-01 00:00:00pages
840-5issue
7eissn
0148-639Xissn
1097-4598pii
10.1002/(SICI)1097-4598(199907)22:7<840::AID-MUS5>journal_volume
22pub_type
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