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Related Experiment Video

Updated: May 16, 2026

Evaluation of Muscle Function of the Extensor Digitorum Longus Muscle Ex vivo and Tibialis Anterior Muscle In situ in Mice

Evaluation of Muscle Function of the Extensor Digitorum Longus Muscle Ex vivo and Tibialis Anterior Muscle In situ in Mice

Published on: February 9, 2013

Double triggering of extensor digiti minimi: a case report.

Sang-Eun Park¹, Young-Yul Kim, Jong-Hun Ji

¹Department of Orthopaedic Surgery, Daejeon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, 520-2 Daehung-dong, Jung-gu, Daejeon, Korea.

Archives of Orthopaedic and Trauma Surgery

|December 5, 2012

Summary

Extensor digiti minimi (EDM) double triggering is a rare condition. This case highlights double triggering caused by impingement on the extensor retinaculum.

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Last Updated: May 16, 2026

Evaluation of Muscle Function of the Extensor Digitorum Longus Muscle Ex vivo and Tibialis Anterior Muscle In situ in Mice

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Published on: February 9, 2013

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Published on: December 1, 2023

Area of Science:

Orthopedics
Hand Surgery
Musculoskeletal Disorders

Background:

Extensor tendon triggering is an uncommon condition.
The extensor digiti minimi (EDM) tendon is responsible for extending the little finger.

Observation:

A rare case of double triggering in the extensor digiti minimi (EDM) tendon was observed.
The triggering occurred at two distinct points along the tendon's path.

Findings:

The patient presented with double triggering of the EDM tendon.
Impingement of the EDM tendon on the extensor retinaculum caused triggering at the dorsal wrist.
A second triggering point was noted over the metacarpal head, also due to impingement.

Implications:

This case expands the understanding of extensor tendon triggering mechanisms.
It emphasizes the importance of considering impingement on the extensor retinaculum in EDM double triggering.
Surgical considerations for EDM triggering may need to address multiple impingement sites.