Palmar carpal arch

Illustration of the Palmar Carpal Arch

The Palmar Carpal Arch is a structural feature of the human hand. It is formed by the carpal bones and the flexor retinaculum, a fibrous band that spans the anterior aspect of the carpal bones. The arch is important in the mechanics of hand movement and grip strength.

Anatomy

The Palmar Carpal Arch is formed by the concave anterior surface of the carpal bones and the flexor retinaculum. The carpal bones involved in the formation of the arch include the scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, and hamate bones. The flexor retinaculum, also known as the transverse carpal ligament, spans the anterior surface of these bones, creating a tunnel-like structure known as the carpal tunnel.

Function

The primary function of the Palmar Carpal Arch is to provide a stable base for the hand and wrist. It allows for the efficient transmission of force from the forearm to the hand, particularly during gripping actions. The arch also protects the tendons, nerves, and blood vessels that pass through the carpal tunnel.

Clinical Significance

Disruption or alteration of the Palmar Carpal Arch can lead to conditions such as carpal tunnel syndrome, a common disorder that results from compression of the median nerve within the carpal tunnel. Other conditions that can affect the arch include fractures of the carpal bones, arthritis, and congenital anomalies.

See Also

• Carpal bones
• Flexor retinaculum
• Carpal tunnel
• Carpal tunnel syndrome