Ulnar claw

Ulnar Claw

Ulnar Claw, also known as Claw Hand or historically referred to as 'Spinster's Claw', is a hand deformity that develops due to damage to the ulnar nerve. This condition affects the hand's posture, particularly the 4th (ring) and 5th (little) fingers, resulting from paralysis of the lumbrical muscles.

Ulnar Claw Hand Deformity

Description and Causes

• The deformity is characterized by hyperextension at the metacarpophalangeal (MCP) joints and flexion at the proximal and distal interphalangeal (PIP and DIP) joints of the 4th and 5th fingers.
• The underlying cause is typically damage or impairment to the ulnar nerve, which may result from various conditions including trauma, nerve compression, or systemic diseases affecting the nervous system.

Symptoms and Diagnosis

• Patients with Ulnar Claw can make a full fist, but upon extending their fingers, the hand assumes the claw-like posture.
• In this condition, the ring and little finger cannot fully extend at the PIP joint.
• Diagnosis is primarily clinical, often involving nerve conduction studies to assess the extent of ulnar nerve damage.

Treatment and Management

• Treatment of Ulnar Claw may include physical therapy, splinting, and in some cases, surgical intervention to restore hand function and appearance.
• Addressing the underlying cause of ulnar nerve damage is crucial for effective treatment.

Implications and Impact

• The deformity can significantly impact the functional use of the hand, affecting grip strength and dexterity.
• It may also have psychological and social implications due to its visible nature.

See Also

• Hand Deformities
• Nerve Damage
• Physical Therapy in Hand Rehabilitation

External Links

• Johns Hopkins Medicine: Ulnar Nerve Dysfunction
• American Academy of Orthopaedic Surgeons: Hand Fractures

References

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