Vol. 2, Issue 11 (2014)

Background: Understanding the morphology of hand tendons and the distribution of juncturae tendinum is crucial in various clinical practices, such as reconstructive surgery, rehabilitation, and hand function optimization. Despite numerous studies on tendon variability, detailed data on the frequency and symmetry of hand tendons, especially across different anatomical zones, remains limited.

Materials and Methods: This study analyzed the presence, frequency, and symmetry of tendons across three zones (Zone 7, Zone 6, Zone 5) in 25 hands, with male and female participants. A systematic approach was used to categorize tendons as single, double, or multiple in the specified zones, and the distribution of juncturae tendinum was recorded in the first to fourth metacarpal spaces.

Results: The findings revealed a high frequency of symmetry in tendons such as Extensor Pollicis Longus (EPL) and Extensor Pollicis Brevis (EPB). The Extensor Digiti Minimi (EDM) showed notable asymmetry, especially in Zone 7, where a high proportion of double tendons were observed in males. Additionally, the distribution of Juncturae tendinum was predominantly Type 2 in the second metacarpal space, with Type 3 more common in the fourth space.

Conclusion: This study provides valuable data on tendon variations and symmetry in the human hand. The findings contribute to a better understanding of tendon function and anatomical diversity, offering practical implications for hand surgery and rehabilitation. Future research should focus on larger, more diverse populations to confirm these results.