Coronal section through right talocrural and talocalcaneal joints. (Medial malleolus labeled at center left.)
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| colspan="2" |Back of left lower extremity. (Medial malleolus labeled at bottom right.)
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|Latin
|colspan="2"|m. medialis
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|
|colspan="2"|[subject #61 ]
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|System
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|Precursor
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|MeSH
|colspan="2"|[]
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|Dorlands/Elsevier
|colspan="2"|[m_02/12511187]
|}
The medial surface of the lower extremity of tibia is prolonged downward to form a strong pyramidal process, flattened from without inward - the medial malleolus.
The medial surface of this process is convex and subcutaneous;
its lateral or articular surface is smooth and slightly concave, and articulates with the talus;
its anterior border is rough, for the attachment of the anterior fibers of the deltoid ligament of the ankle-joint;
its posterior border presents a broad groove, the malleolar sulcus, directed obliquely downward and medialward, and occasionally double; this sulcus lodges the tendons of the Tibialis posterior and Flexor digitorum longus.
The summit of the medial malleolus is marked by a rough depression behind, for the attachment of the deltoid ligament.
