Anatomical Basis of Wrist Drop

Pathophysiology and Mechanism of Wrist Drop

Wrist drop, also known as radial nerve palsy, occurs due to dysfunction or injury to the radial nerve, impairing the extension of the wrist and fingers.

Anatomy of the Radial Nerve

The radial nerve originates from the brachial plexus and travels down the arm, supplying motor and sensory functions to the upper limb.

Causes of Wrist Drop

• Radial nerve compression (e.g., prolonged pressure on the arm)
• Trauma (fractures of the humerus)
• Neurological disorders

Clinical Presentation

Patients exhibit an inability to extend the wrist and fingers, resulting in a characteristic 'dropped' appearance.

Treatment and Management

Management includes physical therapy, splinting, nerve decompression, and addressing underlying causes.