Muscle activity analysis using electromyography during sensory collapse test: An experimental case report - 09/11/24

Doi : 10.1016/j.hansur.2024.101772

Vincent Martinel ^a,^⁎ , Benjamin Ferembach ^b, Karim Anani ^c, Floris Van Rooij ^d, Bethany Grew ^d, Thomas Apard ^e
^a Polyclinique de l’Ormeau ELSAN, 28 Boulevard du 8 Mai 1945, 65000 Tarbes, France
^b CMCT Centre Medico Chirurgical de Touraine, 6 Rue Thérèse et René Planiol, St Cyr sur Loire, 37540, France
^c 5 Rue Georges Magnoac, 65000 Tarbes, France
^d ReSurg SA, Nyon, Switzerland
^e Ultrasound Guided Hand Surgery, Hôpital Privé Les Franciscaines- Ramsey, Versailles, France

^⁎Corresponding author.

Abstract

A 48-year-old right-handed male surgeon complained of finger numbness, pain, cramps and weakness of 2 years’ progression, without improvement after 2 carpal tunnel corticosteroid injections and splinting. The patient was diagnosed with lacertus syndrome with Hagert’s triad. Sensory collapse test was positive, but the sensations during the test were not consistent with the literature. Therefore, a sensory collapse test was performed in combination with electromyography; immediately following cutaneous stimulation, partial transient collapse in muscle tone was observed, without complete interruption. Following surgical release of the ipsilateral median nerve at the lacertus fibrosus, the symptoms were resolved, and combined sensory collapse test and electromyography revealed minimal to no collapse in muscle tone following cutaneous stimulation.

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Keywords : Sensory collapse test, Electromyography, Weakness, Temporal and spatial recruitment