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Development of the human knee joint ligaments
J A Mérida-Velasco1, I Sánchez-Montesinos, J Espín-Ferra
1Department of Morphological Sciences, University of Granada, Spain.
The Anatomical Record
|June 1, 1997
Summary
This study establishes a timeline for human knee joint ligament development. Key ligaments like the patellar and cruciate ligaments form early in embryonic development, with complete knee joint formation by week 14.
Area of Science:
- Embryology
- Anatomy
- Orthopedics
Background:
- Limited research exists on human knee joint ligament development.
- Previous studies focused primarily on cruciate ligaments and their synovial membrane relationship.
Purpose of the Study:
- To establish a comprehensive morphogenetic timetable for human knee joint ligament development.
- To detail the sequential formation of various knee joint ligaments during embryonic and fetal stages.
Main Methods:
- Analysis of 50 serially sectioned human embryonic and fetal lower limbs.
- Detailed observation of ligament formation across different developmental stages (O'Rahilly stages and weeks).
Main Results:
- Patellar ligament formation begins at O'Rahilly stage 20.
- Cruciate ligaments originate from the articular interzone around O'Rahilly stage 21.
- Medial collateral ligament forms by week 9, lateral collateral ligament by O'Rahilly stage 23, with complete knee joint development by week 14.
Conclusions:
- A detailed morphogenetic timetable for knee joint ligament development has been established.
- This provides a foundational understanding of normal knee joint morphogenesis.