Anatomical Basis of Saturday Night Palsy

Prognosis and Prevention Strategies

Saturday Night Palsy is a neuropathic condition resulting from prolonged pressure on the radial nerve, often occurring after deep sleep with the arm draped over an object. Understanding its anatomical basis can aid in prevention and effective management.

Anatomy of the Radial Nerve

The radial nerve originates from the brachial plexus (C5-T1) and traverses the posterior aspect of the humerus within the spiral groove. It is vulnerable to external compression, particularly in the distal arm.

Pathophysiology and Clinical Presentation

• Compression Mechanism: Pressure-induced ischemia disrupts nerve conduction.
• Symptoms: Wrist drop, decreased grip strength, and sensory deficits in the dorsal hand and forearm.
• Diagnosis: Clinical examination complemented by nerve conduction studies.

Prognosis and Recovery

Recovery depends on the severity of nerve damage. Mild cases resolve within weeks, while severe instances may require months of rehabilitation.

Prevention Strategies

• Avoid prolonged pressure on the upper limb during sleep.
• Use cushioned armrests to reduce radial nerve compression.
• Maintain proper ergonomics when sitting or resting.