system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A patient can extend his wrist6 but cannot extend Metacarpophalyngeal joint of hand after he has met with an accident. Sensations in the limb are normal. Level at WhiCh the affected nerve is injured
assistant
The correct answer is  Normal sensation band normal wrist extension with inability to extend MCP joints suggest the diagnosis of PIN injury Most common of injury is around radial head and neck Refer Apleys 9th/e p 282