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Ankle Joint

Ankle Joint

The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...

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Related Experiment Video

Updated: Dec 30, 2025

A Mouse Model of Ankle-Subtalar Complex Joint Instability

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Published on: October 28, 2022

The discomallear ligament: anatomical, microscopical, and radiologic analysis.

Michele Runci Anastasi¹, Veronica Macchi², Valentino Vellone³

¹Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy.

Surgical and Radiologic Anatomy : SRA

|January 27, 2020

Summary

This summary is machine-generated.

The discomallear ligament (DML) was found in 100% of cadaver dissections and CT scans, connecting the temporo-mandibular joint to the malleus. This ligament may explain ear symptoms associated with temporo-mandibular disorders.

Keywords:

Computed tomography Discomallear ligament Dissection Microscopic anatomy

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Area of Science:

Anatomy
Histology
Radiology

Background:

The temporo-mandibular joint (TMJ) and ear structures share anatomical relationships potentially explaining otologic symptoms in TMJ disorders.
The discomallear ligament (DML) is an otomandibular structure situated between the malleus and the retrodiscal capsular complex.

Purpose of the Study:

To investigate the frequency and morphology of the DML through cadaveric dissection.
To characterize the collagen type within the DML.
To evaluate the DML's appearance on routine computed tomography (CT).

Main Methods:

Dissection of five adult cadavers.
Histological analysis of DML collagen type.
CT examination of 40 patients without ear pathology.

Main Results:

The DML was identified in 100% of cadavers and CT scans.
DML primarily composed of collagen type I with abundant elastic fibers.
CT revealed a dense structure connecting the petrotympanic fissure to the malleus; 90% were triangular, 5% rectangular, and 5% curved.

Conclusions:

The DML is a consistently present anatomical structure.
The DML connects the TMJ and malleus, suggesting a potential role in TMJ disorder-related otologic symptoms.