What Is the Subtalar joint? Overview, Functions, And Disorders

A detailed study of joints of subtalar, where they are located with its types and subtalar joint function are mentioned below. Also the subtalar joints disorders and how they can be diagnosed are also illustrated in this article.

What is the subtalar joint?

This subtalar as a joint is a multifaceted joint that is dynamic to motion as it helps to function the foot to readjust itself. It is located just below the joint of the ankle and consists of the calcaneus (known as the heel bone) as well as a column-shaped bone called the talus.

The talocalcaneal joint is the other name of this joint.

The subtalar joint function includes walking, running, leaping, or moving with any fastidiousness. It is mainly placed where fracture, disarticulation, and cracks occur so that it may cause subtalar joint arthrodesis or say osteoarthritis.

Key Points:

  • The ankle and hind foot inversion and eversion are possible with the help of this joint.
  • Another name for the joint is the talocalcaneal joint.
  • You can run, jump, walk as well as move with the help of this joint.

Where is the subtalar joint?

It is located just below the joint of the ankle and consists of the calcaneus (known as the heel bone) as well as a column-shaped bone called the talus. Or in simple terms, the joint is located between the 2 bones known as the heel bone and the talus bone.

Subtalar joint type:

The subtalar joint type includes 3 articulated facets of the subtalar joint, which helps in the movement of the foot here the movement of the foot is also of 2 types known as the anterior articulation allowing the movement of the foot in the forward direction and the posterior subtalar joint that allows the movement of the foot in the backward direction. Now, the 3 subtalar joint facets are as:

  • The anterior subtalar joint (ASTJ)
  • The medial subtalar joint (MSLJ), and
  • The posterior subtalar joint (PSTJ).

Note: the posterior subtalar joint (PSTJ) is the largest component of the subtalar joint.

Subtalar joint anatomy:

The subtalar joint anatomy consists of a complex system made up of foot and ankle which consist of 28 bones, 33 joints, 112 ligaments which in all is part of and measured by 13 extrinsic and 21 intrinsic muscles. In subtalar joint radiology also you can clearly see that it is placed between the posterior calcaneal facet of the talus as well as the posterior talar facet of the calcaneus. Here, the rearfoot, midfoot, and forefoot are the parts of the foot. Although, the main function of this joint is to bear weight and subtalar joint mobilization, and with its parts, some other functions of joint subtalar are as:

  • Associate the body weight,
  • Arrange for the needed balance,
  • Shock absorption,
  • Transferring the reaction forces of the ground,
  • Reimbursing for proximal malalignment,
  • Replacing hand function in individuals

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Subtalar joint injuries:

subtalar joint injuries typically involve subtalar joint dislocation that occurs due to 2 separate bony articulations, the talonavicular and the talocalcaneal joints. Although, there exist four types of subtalar dislocation which are as follows:

  • Medial dislocations
  • Lateral dislocations
  • Anterior dislocations and
  • Posterior dislocations.

Other than this subtalar joint movement is also affected due to problems or damage of capsular or non-capsular. So, let’s see this subtalar disorder.

Capsular disorder: The subtalar joint pain that involves subtalar joint function as well as basically impairs that concerns with the following disorders as:
Juvenile idiopathic arthritis

  • Gout
  • Osteoarthritis
  • Rheumatoid arthritis

2. Non-capsular disorders: The subtalar joint pain that is caused indirectly by subtalar joint movement caused by the injuries of the foot are known out to be as Non-capsular disorders, which includes the following:

  • Subtalar dislocation
  • Tarsal coalition
  • Subtalar instability
  • Polyarthropathy
  • Pes planus also was known by the name of flat feet
  • Pes cavus also is known by the name of the high instep

subtalar joint effusion: The subtalar joint effusion involves swelling and pain, which can cause serious complications It can only be examined using x-rays and/or a Magnetic Resonance Imaging (MRI) process. It is caused by the accumulation of the fluid in the joints of the foot or ankle. Although the subtalar axis movement is difficult to understand.

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Main reasons or causes of subtalar joint effusion:

Some of the main reasons or causes of subtalar joint effusion are as:

  • Twisting down of the ankle or joint
  • Injury
  • Infections
  • overactive immune system

Subtalar joint Diagnosis:

You can diagnose subtalar joints by the way of X-ray, ultrasound, computed tomography (CT) scan, or magnetic resonance imaging (MRI) scan or even by physical examination. And in case of any infection or so blood tests can also be used. It is advisable to follow the doctor’s instructions in case of any serious injury to the joints and follow the doctor’s prescriptions for its treatment as well.

Conclusion:

This joint helps to function the foot to readjust itself. It is located just below the joint of the ankle and consists of the calcaneus (known as the heel bone) as well as a column-shaped bone called the talus. And functions such as walking, running, leaping, or moving are performed with the help of subtalar joint movements. While there exist some subtalar joint problems say subtalar disorder involving subtalar joint arthrodesis, Subtalar joint Osteoarthritis, etc. Which can be diagnosed with the help of X-ray, ultrasound, computed tomography (CT) scan, or magnetic resonance imaging (MRI) scan or even by physical examination. Thus, this article provides you with a brief overview of subtalar joints.

Frequently Asked Questions

What movement occurs at the joint of the subtalar?

The following subtalar joint movements are noticed as:

  • The motions of flexion/extension
  • Inversion/eversion, and
  • Adduction/abduction

What type of joint is subtalar?

It is basically a sole synovial articulation that is formed amid the 2 bones or says, the posterior calcaneal articular facet of the talus as the first bone and the second one is the convex posterior articular facet of the calcaneus. Thus, this joint consists of a complex system made up of foot and ankle which consist of 28 bones, 33 joints, 112 ligaments which in all is part of and measured by 13 extrinsic and 21 intrinsic muscles.

What is the function of the subtalar as a joint?

The inversion and eversion of the foot is the primary subtalar joint function.The subtalar joint function includes walking, running, leaping, or moving with any fastidiousness. It is mainly placed where fracture, disarticulation, and cracks occur so that it may cause subtalar joint arthrodesis or say osteoarthritis.

What motions occur at the joint of the subtalar?

The following subtalar joint motions are there:

  • The motions of flexion/extension
  • Inversion/eversion, and
  • Adduction/abduction

What are the movements of the joint subtalar?

The gliding and rotation are the main subtalar joint movements.

Is the joint a subtalar part of the ankle joint?

Yes, the subtalar joint is the part of the ankle joint. As ankle joint consists of 3 parts as:

  • The ankle joint proper or talocrural joint
  • The subtalar joint, and
  • The inferior tibiofibular joint.

Why does my subtalar as a joint hurt?

The subtalar as a joint hurts as it bears the body weight and is responsible for the movement of the foot and activities such as running, walking, etc.

Which are the two tarsal bones that contribute articular surfaces to the anatomical subtalar joint?
The two tarsal bones are Talus and calcaneus which contribute articular surfaces to the anatomical subtalar as a joint.

 

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