Lower extremity of tibia
||It has been suggested that this article be merged into Tibia. (Discuss) Proposed since November 2014.|
|Lower extremity of tibia|
Lower extremity of tibia seen from the front
Lower extremity of tibia seen from the back
|Latin||Extremitas distalis tibiae|
|Anatomical terms of bone|
The inferior articular surface is quadrilateral, and smooth for articulation with the talus. It is concave from before backward, broader in front than behind, and traversed from before backward by a slight elevation, separating two depressions. It is continuous with that on the medial malleolus.
The anterior surface of the lower extremity is smooth and rounded above, and covered by the tendons of the Extensor muscles; its lower margin presents a rough transverse depression for the attachment of the articular capsule of the ankle-joint.
The posterior surface is traversed by a shallow groove directed obliquely downward and medialward, continuous with a similar groove on the posterior surface of the talus and serving for the passage of the tendon of the Flexor hallucis longus.
The lateral surface presents a triangular rough depression for the attachment of the inferior interosseous ligament connecting it with the fibula; the lower part of this depression is smooth, covered with cartilage in the fresh state, and articulates with the fibula. The surface is bounded by two prominent borders (the anterior and posterior colliculi), continuous above with the interosseous crest; they afford attachment to the anterior and posterior ligaments of the lateral malleolus.
The medial surface -- see medial malleolus for details.
Ankle fractures of the tibia have several classification systems based on location or mechanism:
- Medial malleolus - Herscovici classification
- Posterior malleolus - Haruguchi classification
- Mechanism - Lauge-Hansen classification
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