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
Defective function of which of the following causes hyperacusis
assistant
The correct answer is  Paralysis of stapedius muscle which is supplied by 7th cranial nerve causes hyperacusis or phonophobia Ref: Dhingra 7e pg 510.