Midcarpal joint

The Midcarpal joint is a compound joint located in the wrist, between the proximal and distal rows of carpal bones. It is one of the two main joints in the wrist, the other being the radiocarpal joint. The midcarpal joint plays a crucial role in the complex movements of the wrist.

Etymology

The term "midcarpal" is derived from the Latin words "medius" meaning middle, and "carpus" meaning wrist. Thus, "midcarpal" refers to the joint in the middle of the wrist.

Anatomy

The midcarpal joint is composed of the articulation between the proximal and distal rows of carpal bones. The proximal row includes the scaphoid, lunate, and triquetrum bones, while the distal row includes the trapezium, trapezoid, capitate, and hamate bones. The pisiform bone, although part of the proximal row, does not participate in the midcarpal joint.

Function

The midcarpal joint allows for the complex movements of the wrist, including flexion, extension, abduction, and adduction. It also contributes to the combined movements of circumduction and rotation.

Clinical significance

Injuries or diseases affecting the midcarpal joint can lead to significant impairment of wrist function. Conditions such as carpal instability, osteoarthritis, and rheumatoid arthritis can affect the midcarpal joint. Treatment options for these conditions can range from conservative management with physiotherapy and medication, to surgical interventions such as arthroscopy or arthroplasty.

See also

• Carpal bones
• Wrist joint
• Carpal instability
• Osteoarthritis
• Rheumatoid arthritis

References

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  Gray336
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  Gray334