Uncrossed Asymmetry in Pattern Visual Evoked Potentials: A Reappraisal.

Purpose: To demonstrate the utility of an uncrossed asymmetry in full-field pattern reversal visual evoked potentials (FF-PVEPs) will accurately predict a retrochiasmal lesion confirmed by MRI.

Methods: During an 8-year period, 754 patients had FF-PVEPs performed and analyzed without knowledge of their clinical histories and imaging studies. Interhemispheric amplitude ratios were calculated between N75-P100 and P100-N145 and deemed significant if both demonstrated greater than 50% amplitude asymmetry no matter which eye was stimulated (uncrossed symmetry).

Correlation between preoperative Kimura inching studies and intraoperative findings during endoscopic-assisted decompression of the ulnar nerve at the elbow.

Background: During the evolution of the senior author's technique of ulnar nerve transposition to in situ decompression for ulnar neuropathy at the elbow, nerve conduction studies (NCS) including the Kimura inching method were performed preoperatively in an effort to ensure that all potential sites of compression were investigated intraoperatively. The purpose of this study is to compare the results of the Kimura inching technique with the intraoperative findings noted during decompression of the ulnar nerve at the elbow.

Methods: The medical records of consecutive patients who underwent in situ decompression of their ulnar nerves combined with endoscopic examination between March and December of 2009 were retrospectively reviewed.

Prolonged compound muscle action potential duration in critical illness myopathy: report of nine cases.

The objective of this study was to determine the diagnostic use of compound muscle action potential duration in patients with critical illness myopathy. Accurate diagnosis is important because the muscles recover once the offending agents are withdrawn. We retrospectively reviewed 9 cases seen at our institution between 1999 and 2003 in which critical illness myopathy was diagnosed on the basis of clinical and electrophysiological evaluations.