Further insight on A-wave in acute and chronic demyelinating neuropathies

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
Ferdinando SartucciAlessandro Rossi

Abstract

A-wave is a late motor response that maintains the same characteristics of latency, amplitude and shape with every electrical stimuli at a proper given intensity. The presence of A-waves was reported both in chronic (CIDP) and acute (AIDP) forms of inflammatory demyelinating polyradiculoneuropathy. It is attributed to the effect of either sprouting phenomena or ephaptic/ectopic discharge. In the first condition it could be a sign of functional recovery, while in the second it could represent an early indicator of demyelination. Aims of our research were to investigate retrospectively the presence of the A-waves, establishing whether its frequency is more common in CIDP or AIDP. Data from 77 patients, 57 male and 20 female, mean age 60.7 years (SD 15.4), were recovered from clinical records and their neurophysiological tests retrieved for reanalysis. Our results seem to indicate that A-waves can represent an early sign of acute pathology of peripheral nervous system.

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Citations

May 31, 2018·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·Sindhuja LakshminarasimhanLakshminarasimhan Ranganathan
Jun 3, 2011·Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society·José A GarbinoPedro Schestatsky
Aug 19, 2020·Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·Liborio RampelloFrancesco Patti

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