Pilot study: Differences in echo intensity ratios between ulnar and median innervated muscles in ulnar neuropathy

Hanboram Choi, Jun Ho Choi, Seok Kang, Joon Shik Yoon, Seong Ho Son

    Research output: Contribution to journalArticlepeer-review


    Background: This study evaluated muscle echo intensity (EI) ratio in patients with ulnar neuropathy at the elbow (UNE) and healthy controls. Methods: In this prospective study, 28 patients with electrodiagnostically confirmed unilateral UNE and 12 healthy controls were ultrasonographically assessed for EI ratios of the hypothenar and thenar muscles. The affected and unaffected hands between the UNE patients and controls and patient subgroups (subdivided according to electrodiagnostic severity) were compared to determine any significant differences. Results: In patients with UNE, the EI ratio of the hypothenar to thenar muscles was significantly higher for the affected side than for the unaffected side (1.08 ± 0.11 and 0.97 ± 0.18, respectively) or the control group (0.95 ± 0.05). A significant difference in the EI ratio was observed among the subgroups (mild vs. severe subgroup, P < 0.01). Conclusions: Ultrasonographic EI measurement may be a useful parameter in the evaluation and screening of UNE.

    Original languageEnglish
    Pages (from-to)387-391
    Number of pages5
    JournalMuscle and Nerve
    Issue number4
    Publication statusPublished - 2019 Oct 1

    Bibliographical note

    Funding Information:
    information Electronics and Telecommunications Research Institute, Grant/Award Number: 18ZR1230

    Publisher Copyright:
    © 2019 Wiley Periodicals, Inc.


    • electromyography
    • inhomogeneity ratio
    • muscle echo intensity ratio
    • ulnar neuropathy
    • ultrasonography

    ASJC Scopus subject areas

    • Physiology
    • Clinical Neurology
    • Cellular and Molecular Neuroscience
    • Physiology (medical)


    Dive into the research topics of 'Pilot study: Differences in echo intensity ratios between ulnar and median innervated muscles in ulnar neuropathy'. Together they form a unique fingerprint.

    Cite this