A Unique Three-Tendinous Head Reverse Palmaris Longus: A Case Report

Area of Science:

• Anatomy
• Morphology
• Human Anatomy

Background:

• The Palmaris longus (PL) is a superficial forearm muscle with clinical significance.
• Variations in PL anatomy, including agenesis and multiple bellies, have been documented.
• The PL serves as a crucial landmark in procedures like carpal tunnel syndrome injections and as a surgical graft.

Observation:

• A unique variation of the Palmaris longus muscle was observed during a cadaver dissection.
• This variation presented as a three-tendinous head reverse Palmaris longus.
• The discovery was made by medical students at the University of Medicine and Health Sciences, St. Kitts and Nevis.

Findings:

• The observed Palmaris longus exhibited an unusual three-tendinous head structure.
• The muscle's orientation was reversed compared to the typical anatomical presentation.
• This specific variation is considered exclusive and distinct from previously reported anomalies.

Implications:

• Understanding rare anatomical variations like this three-tendinous head reverse PL is vital for accurate surgical planning.
• Such findings enhance the anatomical knowledge base, aiding in the interpretation of diagnostic imaging.
• This case highlights the importance of meticulous cadaver dissection in uncovering and documenting anatomical diversity.