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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
Crus commune is a pa of:
assistant
The correct answer is  Semicircular CanalsThere are 3 semicircular canals - the lateral, posterior and superior which lie in a plane of right angles to one anotherEach canal has an ampullated end which opens independently into the vestibule and a non ampullated endThe non-ampullated ends of posterior and superior canals unite to form a common channel called the crus commune.So the three canals open into the vestibule by 5 openings.