An Accessory Extensor Digitorum Longus Muscle - a Rare Variation

Area of Science:

• Anatomy
• Morphology

Background:

• Anatomical variations in lower limb muscles can impact surgical outcomes.
• The extensor digitorum longus (EDL) muscle is a key component of the anterior leg.

Purpose of the Study:

• To document and describe a rare bilateral variation of the extensor digitorum longus muscle.
• To highlight the clinical significance of this anatomical anomaly for medical practitioners.

Main Methods:

• Routine dissection of a 61-year-old female cadaver's lower limbs.
• Detailed observation and documentation of muscle belly division and insertion patterns.

Main Results:

• The extensor digitorum longus muscle exhibited variations in its tendinous slips and insertions on both legs.
• An accessory EDL muscle was identified, with differing insertions on the fourth and fifth digits of each foot.

Conclusions:

• This reported variation of the extensor digitorum longus muscle is novel and has not been previously documented.
• Awareness of such anomalies is vital for surgeons and orthopedicians to prevent complications like contractures and ensure successful surgical interventions.