Pisohamate ligament

Pisohamate Ligament

Illustration of the Pisohamate Ligament

The pisohamate ligament is a fibrous band in the human wrist that plays a crucial role in the stability and function of the hand. It connects the pisiform bone to the hamate bone, specifically to the hook of the hamate, and is part of the complex network of ligaments that support the carpal bones.

Anatomy

The pisohamate ligament is located on the ulnar side of the wrist. It is a continuation of the flexor carpi ulnaris tendon, which inserts into the pisiform bone. From the pisiform, the ligament extends to the hook of the hamate, forming a strong connection between these two carpal bones.

Structure

The ligament is composed of dense regular connective tissue, which provides it with the strength and flexibility needed to withstand the mechanical forces exerted during wrist movements. The pisohamate ligament is part of the ulnar canal (also known as Guyon's canal), through which the ulnar nerve and ulnar artery pass.

Function

The primary function of the pisohamate ligament is to stabilize the pisiform and hamate bones, contributing to the overall stability of the ulnar side of the wrist. It also plays a role in the transmission of forces from the forearm to the hand, particularly during gripping and lifting activities.

Clinical Significance

Injuries to the pisohamate ligament can occur due to trauma or overuse, leading to pain and dysfunction in the wrist. Such injuries may be associated with conditions like ulnar tunnel syndrome, where compression of the ulnar nerve occurs within Guyon's canal. Diagnosis of pisohamate ligament injuries often involves clinical examination and imaging studies such as MRI or ultrasound.

Related Pages

• Pisiform bone
• Hamate bone
• Flexor carpi ulnaris
• Ulnar nerve
• Ulnar tunnel syndrome