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
Regarding stapedial reflex, which of the following is true -
assistant
The correct answer is  Stapedius muscle helps to dampen very loud sound and thus prevents noise trauma to the inner ear. It is supplied by VII nerve (facial nerve). Lesions of facial nerve lead to loss of stapedial reflex and hyperacusis or phonophobia i.e. intolerance to loud sounds.
For more details see chapter – physiology of hearing and assessment of hearing loss of the guide
NOTE:
Stapedial reflex = Acoustic reflex