Severe and extreme idiopathic median nerve lesions at the wrist: New insights into electrodiagnostic patterns and review of the literature

Abstract

In idiopathic severe and extreme MNLW, the DML to the 2L and averaged SC from digit 2 can be present when other responses are absent.

Prognosis of severe carpal tunnel syndrome with absent compound muscle action potential

“…Among clinical parameters, age and presence or absence of diabetes mellitus (DM) were selected. From preoperative neurophysiological findings, 3 parameters were selected: presence or absence of the median SNAP (abbreviated simply as “SNAP”; an orthdromic SNAP may be preserved even when the APB‐CMAP is lost . An orthodromic SCS that is completely free from CMAP artifact enables identification of such a small SNAP), and the latency and amplitude of the 2L‐CMAP (2L‐DML and 2L‐Amp).…”

“…From preoperative neurophysiological findings, 3 parameters were selected: presence or absence of the median SNAP (abbreviated simply as “SNAP”; an orthdromic SNAP may be preserved even when the APB‐CMAP is lost . An orthodromic SCS that is completely free from CMAP artifact enables identification of such a small SNAP), and the latency and amplitude of the 2L‐CMAP (2L‐DML and 2L‐Amp). Postoperative APB‐CMAP amplitude (post APB‐Amp) at 12 months was used as the main outcome measure, because progressive recovery was observed from 6 to 12 months, as shown later.…”

Carpal tunnel syndrome in pregnancy

“…In this issue, Dr. Paul Seror presents us with a lifetime's experience of CTS in pregnancy as seen from the perspective of the neurophysiologist. 2 What is in no doubt at all is that CTS is much commoner during pregnancy than in women of child-bearing age generally. The annual incidence of CTS coming to medical attention in women aged 20-45 y in the United Kingdom averages about 0.07% 3 while estimates of the incidence during pregnancy range from 0.34% of 14,579 pregnancies at the Mayo Clinic 4 to 62% of 76 pregnancies in Italy.…”