Medial malleolus

Infobox Bone
Name = Medial malleolus
Latin = m. medialis
GraySubject = 61
GrayPage = 259

---

Caption = Coronal section through right talocrural and talocalcaneal joints. (Medial malleolus labeled at center left.)


Caption2 = Back of left lower extremity. (Medial malleolus labeled at bottom right.)
System =
MeshName =
MeshNumber =
DorlandsPre = m_02
DorlandsSuf = 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.

ee also

* Ankle
* Bimalleolar fracture
* Lateral malleolus
* Posterior malleolus
* Trimalleolar fracture

=Additional

External links

* [http://academic.wsc.edu/faculty/jatodd1/351/tibia_fibula.jpgDiagram at wsc.edu]
* [http://footandankle.mdmercy.com/conditions/ankle_injury/instability.html Diagnostic imaging]