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, 48 (4), 368-373
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Anatomical Study on the Anterolateral Ligament of the Knee

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Anatomical Study on the Anterolateral Ligament of the Knee

Camilo Partezani Helito et al. Rev Bras Ortop.

Abstract

Objective: Describe the knee anterolateral ligament (ALL) and establish its anatomical marks of origin and insertion.

Methods: Dissection of the anterolateral aspect of the knee was performed in six cadavers. After isolation of the ALL, its lenght, width and thickness were measured as its places of origin and insertion. The ALL origin was documented in relation to the lateral collateral ligament (LCL) origin and the insertion was documented in relation to the Gerdy tubercle, fibullar head and lateral meniscus. After the first two dissections, the ligament was removed and sent to histologycal analysis.

Results: The ALL was clearly identified in all knees. Its origin in the lateral epycondile was on average 0.5 mm distal and 2.5 mm anterior to the LCL. In the tibia, two insertions were observed, one in the lateral meniscus and another in the proximal tibia, about 4.5 mm distal to the articular cartilage, between the Gerdy tubercle and the fibullar head. The average measures obtained were: 35.1 mm lenght, 6.8 mm width and 2.6 mm thickness. In the ligament histological analysis, dense connective tissue was observed.

Conclusion: The ALL is a constant structure in the knee anterolateral region. Its origin is anterior and distal to the LCL origin. In the tibia, it has two insertions, one in the lateral meniscus and another in the proximal tibia between the Gerdy tubercle and the fibullar head.

Keywords: Anterior cruciate ligament/anatomy & histology; Cadaver; Dissection; Knee.

Figures

Fig. 1
Fig. 1
Lateral view of the left knee of a cadaver with isolation of the anterolateral ligament of the knee (arrow 1), lateral collateral ligament (arrow 2) and tendon of the popliteal muscle (arrow 3).
Fig. 2
Fig. 2
Lateral view of the knee showing anterolateral ligament anteriorly to the lateral collateral ligament.
Fig. 3
Fig. 3
Origin of the anterolateral ligament proximally to the origin of the lateral collateral ligament.
Fig. 4
Fig. 4
Origin of the anterolateral ligament distally to the origin of the lateral collateral ligament.
Fig. 5
Fig. 5
Insertion of the anterolateral ligament in the lateral.
Fig. 6
Fig. 6
Insertion of the anterolateral ligament between the Gerdy tubercle and the fibular head (asterisk), distally to the insertion in the lateral meniscus (arrow).

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