What is the mortise of the ankle?

The ankle joint is a hinged synovial joint that is formed by the articulation of the talus, tibia, and fibula bones. Together, the three borders (listed below) form the ankle mortise. The superior portion of the ankle joint forms from the inferior articular surface of the tibia and the superior margin of the talus.

Where is the mortise in the ankle?

A majority of the articular surface is formed by the horizontal portion of the distal tibia (the tibial plafond) which extends parallel to the dome of the talus; taken with the medial and lateral malleoli, it forms a rectangular socket known as the ankle mortise.

What is the mortise of the foot?

The “mortise” is the concaved surface formed by the tibia and fibula. The mortise is adjustable and is controlled by the proximal and distal tibiofibular joints. The talus articulates with this surface and allows dorsiflexion and plantar flexion. Let’s identify the bones of the foot.

What is disruption of the ankle mortise?

When the mortise is disrupted by a fracture, the talus is free to move more than it should. This abnormal motion leads to focal pressure points which can be damaging. Recall that pressure is defined by the force (load) divided by area.

How do you do a ankle mortise view?

Patient position

  1. the patient may be supine or sitting upright with the leg straightened on the table.
  2. the leg must be rotated internally 15° to 20°, thus aligning the intermalleolar line parallel to the detector. …
  3. internal rotation must be from the hip; isolated rotation of the ankle will result in a non-diagnostic image.

What does mortise mean in medical terms?

A depression, groove, or hole into which another anatomical structure fits.

What is another name for the ankle mortise?

Synonyms: AP mortice view of ankle.

What is an ankle mortise is symmetric?

On the mortise view, the ankle articular spaces should appear symmetrical. The superior surface of the talus should be congruous with the tibial plafond, and the medial and lateral articular spaces should be equal and comparable to the superior surface. The subchondral bone that forms the Shenton line should be intact.

What is the ankle syndesmosis?

The syndesmosis is a fibrous joint held together by ligaments. It’s located near the ankle joint, between the tibia, or shinbone, and the distal fibula, or outside leg bone. That’s why it’s also called the distal tibiofibular syndesmosis. It’s actually made up of several ligaments.

What is the ball on your ankle called?


A malleolus is the bony prominence on each side of the human ankle. Each leg is supported by two bones, the tibia on the inner side (medial) of the leg and the fibula on the outer side (lateral) of the leg. The medial malleolus is the prominence on the inner side of the ankle, formed by the lower end of the tibia.

How is mortise view done?

The AP mortise view is done with the leg internally rotated 15-20o so that the x-ray beam is perpendicular to the inter-malleolar line. This view permits examination of the articular space (clear space).

What does a mortise view show?

The mortise view shows the entire mortise joint space between the talar dome and the medial malleolus, tibial plafond and lateral malleolus (Figures 1B and 2). On the AP view, the lateral malleolus overlaps and obscures the lateral joint space (Figure 1A).

How is mortise taken?

The Mortise-view is an AP-view taken with a 15-25? endorotation of the foot. The technologist turns the foot inwards until the lateral malleolus is at the same height as the medial malleolus. This view visualizes both the lateral and medial joint spaces.

What is medial ankle mortise?

Taken with the medial and lateral malleoli, it forms a rectangular socket, the ankle mortise (a.k.a. mortice 1). Being a synovial joint, the ankle joint (between the ankle mortise and talar dome) is surrounded by a joint capsule.

What are the ligaments in the ankle?

The major ligaments of the ankle are: the anterior tibiofibular ligament (2), which connects the tibia to the fibula; the lateral collateral ligaments (3), which attach the fibula to the calcaneus and gives the ankle lateral stability; and, on the medial side of the ankle, the deltoid ligaments (4), which connect the …

What is Sinus Tarsi?

What is the sinus tarsi? The sinus tarsi anatomy is a small tunnel that sits between the two parts of the subtalar joint in the ankle. This small tunnel contains nerves, sinus tarsi ligaments, and blood vessels that can be damaged and cause pain.

Can a sinus infection affect your feet?

The most common symptom is tenderness of the sinus tarsi area of the foot. When this symptom can be produced by direct pressure on the area, it confirms the diagnosis and rules out other conditions. Common symptoms of sinus tarsi syndrome include: Chronic pain along the anterolateral (front and side) part of the ankle.

Can sinus affect your feet?

The sinus tarsi is a large opening on the outside aspect of the foot/ankle where blood vessels, nerves and soft tissue are housed. Known as the ‘eye of the foot’ or ‘bullet hole’. Sinus tarsi syndrome is localised pain and swelling in the sinus tarsi region, often following an ankle injury.

Can sinus cause foot pain?

Symptoms. Sinus tarsi syndrome commonly leads to pain over the outside of the back of the foot. Swelling over the hollow between the ankle bone and the heel bone can develop. The swelling can enlarge so that it can be mistaken for a cyst or tumor.

Where are sinuses on your feet?

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Where is the sinus on the foot?

The sinus tarsi is a tunnel between the talus and the calcaneus that contains structures that contribute to the stability of the ankle and to its proprioception but can get damaged in the sinus tarsi. The joint between the talus and calcaneus is also known as the subtalar joint.

What causes pain on the top of the foot?

Pain on the top of the foot can be caused by different conditions, the most common of which are due to overuse in activities like running, jumping, or kicking. Conditions caused by overuse include: Extensor tendonitis: This is caused by overuse or tight-fitting shoes.

Why does the top of my foot hurt near my ankle?

Treating pain on the top of your foot near the ankle caused by extensor tendinitis. Extensor tendinitis is often caused by frequently wearing tight-fitting shoes. Wearing shoes that fit too tightly puts pressure on the tendons running along the top of your foot, which causes painful inflammation.

Why does the top of my ankle hurt?

The most common causes include injury, arthritis and normal wear and tear. Depending on the cause, you may feel pain or stiffness anywhere around the ankle. Your ankle may also swell, and you may not be able to put any weight on it. Usually, ankle pain gets better with rest, ice and over-the-counter pain medications.