Palmar plate

Palmar Plate

The Palmar Plate also known as the volar plate is a thick, fibrocartilaginous structure found in the hand. It is located on the palmar side of the metacarpophalangeal (MCP) and interphalangeal joints (IP) of the fingers.

Function

The primary function of the palmar plate is to prevent hyperextension of the MCP and IP joints. It also serves as an attachment site for several important structures in the hand, including the collateral ligaments and the joint capsule.

Anatomy

The palmar plate is a fibrocartilaginous structure that is firmly attached to the base of the proximal phalanx and the metacarpal head in the MCP joint, and the proximal and distal phalanges in the IP joints. It is composed of dense connective tissue that is capable of withstanding the forces applied to the hand during gripping and other activities.

Clinical Significance

Injuries to the palmar plate can occur as a result of trauma or overuse. These injuries are often associated with sports and other physical activities that involve repetitive gripping or bending of the fingers. Palmar plate injuries can lead to pain, swelling, and decreased range of motion in the affected finger. Treatment typically involves rest, immobilization, and physical therapy. In severe cases, surgery may be required to repair the damaged plate.

See Also

• Hand anatomy
• Metacarpophalangeal joint
• Interphalangeal joint
• Collateral ligaments
• Joint capsule

References

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Palmar_plate

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  Illustration of the metacarpophalangeal joint
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  Anatomical illustration from Gray's Anatomy
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  Anatomical illustration from Gray's Anatomy