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Motor branch of extensor carpi radialis longus: anatomic localization
François Genet1, Katell Autret, Alexis Schnitzler
1Service de Médecine Physique et de Réadaptation, CHU R. Poincaré, Garches, France. francois.genet@rpc.aphp.fr
Archives of Physical Medicine and Rehabilitation
|March 31, 2012
Summary
This study precisely mapped the extensor carpi radialis longus (ECRL) motor nerve using cadavers. These anatomical landmarks aid in precise nerve blocks for clinical assessments.
Area of Science:
- Anatomy
- Neuroscience
- Orthopedics
Background:
- The extensor carpi radialis longus (ECRL) muscle is crucial for wrist extension.
- Precise anatomical knowledge of the ECRL motor nerve is needed for targeted interventions.
Purpose of the Study:
- To identify extensor carpi radialis longus (ECRL) motor nerve coordinates in relation to anatomic surface landmarks.
- To provide data for accurate ECRL motor nerve blocks.
Main Methods:
- Descriptive study using 20 fresh adult cadaver upper limbs.
- Anatomic dissection to identify the ECRL motor branch.
- Measurements of nerve emergence distance, depth, and ratio to intercondylar distance.
Main Results:
- The ECRL motor branch was identified between the brachioradialis and ECRL muscles.
- Mean nerve depth was 35.6 mm, with a mean ratio of nerve depth to intercondylar distance of 0.46.
- The injection point was located between the lateral epicondyle posteriorly and the wrist extensor group anteriorly.
Conclusions:
- The ECRL motor nerve branch is accessible via specific surface landmarks.
- Selective motor nerve blocks of the ECRL branch can aid clinical assessment and surgical planning.
- This technique can help evaluate the extensor carpi radialis brevis function and antagonist muscle activity.
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