Morphological characteristics of the lateral ankle ligament complex

Area of Science:

• Anatomy
• Biomechanics
• Orthopedics

Background:

• The lateral ankle ligament complex is crucial for ankle stability.
• Individual ligament roles, particularly their interconnections, require further clarification.

Purpose of the Study:

• To elucidate the morphological characteristics and functional relevance of the anterior talofibular ligament (ATFL), calcaneofibular ligament (CFL), and posterior talofibular ligament (PTFL).
• To investigate the interconnections between these ligaments.

Main Methods:

• Morphometric analysis of 152 Japanese cadaveric legs.
• Measurement of ATFL, CFL, and PTFL lengths and widths.
• Classification of ATFL into three types based on fiber bundles and comparison of ligament dimensions.

Main Results:

• The ATFL, CFL, and PTFL were observed to connect at the lateral malleolus.
• ATFL Type II (two fiber bundles) was the most prevalent type (54.6%).
• No significant differences in CFL and PTFL lengths or widths were found between ATFL type groups.

Conclusions:

• The lateral ankle ligaments exhibit interconnections, suggesting a coordinated role in ankle joint stabilization.
• Understanding these anatomical relationships is key for diagnosing and treating ankle injuries.