Abstract:
INTRODUCTION:Conduction block (CB) has been included in the Rajabally criteria for axonal Guillain-Barré syndrome (GBS). Because the nerve roots may be affected early in GBS, detection of proximal CB by the triple stimulation technique (TST) can be useful. METHODS:We describe TST findings in 2 patients who presented with the pharyngeal-cervical-brachial (PCB) variant of axonal GBS. RESULTS:In the first patient, although conventional nerve conduction studies (NCS) did not fit electrodiagnostic criteria for axonal GBS, the TST detected proximal CB in the median and ulnar nerves. In the second patient, NCS fulfilled criteria for axonal GBS, and the TST detected proximal CB in the median nerve. After plasmapheresis, NCS and TST findings were normalized, suggesting reversible conduction failure rather than demyelinating CB. CONCLUSION:The TST may be useful for diagnosis of PCB when NCS remain inconclusive. The technique provides additional clues for classifying PCB into the acute nodo-paranodopathies.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Taieb G,Grapperon AM,Duclos Y,Franques J,Labauge P,Renard D,Yuki N,Attarian Sdoi
10.1002/mus.24729subject
Has Abstractpub_date
2015-12-01 00:00:00pages
1102-6issue
6eissn
0148-639Xissn
1097-4598journal_volume
52pub_type
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