What Is a Subtalar Joint?

The talar posterior articular surface and the calcaneal posterior articular surface constitute a joint, which is called the talar joint.

The talar posterior articular surface and the calcaneal posterior articular surface constitute a joint, which is called the talar joint.

Western Medicine Name

Talar joint

Affiliated Department

Internal Medicine-Oncology

Contagious

Contagious

Whether to enter health insurance

Yes

Talion joint overview

The joint capsule of this joint is loose and is attached to the periphery of the joint surface. The inner surface of the fiber layer is lined with a synovial membrane and has an independent joint cavity. Several ligaments are attached around this joint capsule. Foot crush injuries can damage this joint.

Talion joint type

There are many types of metatarsal joints, the more important ones are the talar heel, talar heel boat, heel roll, and zygomatic transverse joint.

The tartal talar joint is composed of the posterior articular surface below the talus and the posterior articular surface of the calcaneus, so it is also called the subtalar joint, which is a micromotion joint. The joint capsule is thin and loose, with some strong ligaments connecting the talar bones.

The tartal calcaneus joint head is the talar head. The joint fossa is composed of the talar articular surface at the rear of the scaphoid and the anterior and middle articular surfaces above the calcaneus. It is similar to the ball and socket joint, but it can only move slightly. The talar calcaneal ligament around the talar calcaneus joint, the talar calcaneal ligament, and the divergent ligament, etc., of which the most important is the cruciate ligament. This ligament is short, wide, strong, and starts from the calcaneus. The leading edge ends at the underside and medial side of the scaphoid. The medial edge shifts to the triangular ligament, the lateral edge and the leading edge of the bifurcation ligament heal, and there is an articular surface composed of triangular fibrocartilage plates, forming a part of the ankle heel fossa. The heel ligament lateral ligament supports the talar head and is an important structure for maintaining the arch of the foot.

The ankle joint, talar heel joint, and talar heel joint often move together during foot movement, so these three joints are generally referred to as the foot joint. The talus is in the position of a bony joint disc in the foot joint, that is, when the upper joint cavity is active, it mainly shows the plantar flexion and dorsiflexion of the foot, and when the lower joint cavity (between the talus and the calcaneus, the scaphoid) is active, Through the axis connecting the back of the calcaneus and the upper midpoint of the talar neck (the oblique line from back to front and up), the calcaneus, scaphoid, and other foot bones rotate against the talus, the medial edge of the foot is raised, and the metatarsal surface turns to the inside It is called varus. Conversely, when the lateral edge of the foot is lifted, the plantar surface turns to the outside. In general, plantar flexion is often accompanied by varus, and dorsiflexion is often accompanied by eversion.

(3) The calcaneal joint consists of the articulation of the calcaneus and the posterior articular surface of the cubus, which are micro-motion joints. There are some ligaments around the joints. Among them, the important ligament, the long ligament of the ligament, starts from the posterior part of the calcaneus, and stops forward on the sacrum and the 2nd to 4th metatarsal bases. It plays an important role in maintaining the lateral longitudinal arch. The heel ligament lateral ligament starts from the anterior part of the calcaneus condyle and ends at the posterior part of the sacral condyle, and also maintains the lateral longitudinal arch of the foot.

The sacroiliac transverse joint, or Chopart joint, is composed of the heel joint and the talon joint. The joint line bends in an S shape across the middle of the metatarsal group, with the medial part protruding forward and the lateral part protruding rearward. These two joints are independent joints, and the joint cavities are not connected with each other. There is a bifurcated ligament between the two joints. It starts from the back of the calcaneus and divides forward into two bundles. One bundle ends at the scaphoid bone and one bundle ends at the dice bone. When performing amputation along the sacroiliac joint line clinically, this ligament must be cut .