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
Which test can detect facial nerve palsy occurring due to the lesion at the outlet of stylomastoid foramen -
assistant
The correct answer is  Injury at stylomastoid foramen causes LMN palsy, so the face sags and drawn across to the opposite side.
Chorda tympani is spared at this level, taste sensation over anterior 2/3 of tongue is preserved.