You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Which test can detect facial nerve palsy occurring due to the lesion at the outlet of stylomastoid foramen - and explain in detail?
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.