The TT joint most likely refers to the transverse tarsal joint, also known as the midtarsal joint or Chopart's joint, which is a critical joint in the foot. It's formed by the connection of specific bones in the midfoot.
Components of the Transverse Tarsal Joint
The transverse tarsal joint is essentially two distinct articulations working together:
- Calcaneocuboid Joint: This is where the calcaneus (heel bone) connects with the cuboid bone.
- Talonavicular Joint: (Specifically part of the talocalcaneonavicular joint) This is where the talus (ankle bone) articulates with the navicular bone.
Function
This joint complex allows for inversion and eversion movements of the foot, contributing to its flexibility and ability to adapt to uneven surfaces. Inversion is the movement of the sole of the foot inward, while eversion is the movement of the sole of the foot outward.
Clinical Significance
The transverse tarsal joint is clinically significant in several ways:
- Foot Deformities: It plays a role in various foot deformities, such as clubfoot.
- Surgical Procedures: It is a key landmark in certain surgical procedures related to the foot and ankle.
- Biomechanics: Understanding the biomechanics of this joint is crucial for diagnosing and treating foot and ankle problems.
