Related Experiment Video
Updated: Jun 16, 2026

Nerve Ultrasound Protocol to Detect Dysimmune Neuropathies
Published on: October 7, 2021
Ulnar neuropathy with normal electrodiagnosis and abnormal nerve ultrasound
Joon Shik Yoon1, Francis O Walker, Michael S Cartwright
1Department of Physical Medicine and Rehabilitation, Korea University College of Medicine, Seoul, South Korea. rehab46@korea.ac.kr
Abstract:
Ulnar neuropathy at the elbow (UNE) is the second most common entrapment neuropathy. It is diagnosed with electrodiagnostic studies, but they can yield false-negative results. Ultrasound was used to examine 4 patients with UNE and negative electrodiagnostic findings, and it showed ulnar nerve enlargement near the elbow in all cases, with a mean cross-sectional area of 20.1 mm. This indicates that ultrasound may be a useful tool for assessing those with UNE symptoms and normal electrodiagnostic findings.
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