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 Dehiscence in the external auditory canal cause infection in the parotid gland via: and explain in detail?
(a) Fissure of Santorini(Ref. Cummings, 6th ed., 1981)The notch of Rivinus is the upper attachment of pars flaccida.Petro-tympanic fissure is present on the anterior wall of middle ear, on which attaches the anterior malleolar ligament.Retropharyngeal fissure does not exist.