The three ducts lie in planes at right angles to each other and connect with which nerve?

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The semicircular canals are the three ducts arranged in orthogonal planes to detect rotation in any direction. They connect to the vestibular branch of the vestibulocochlear nerve (cranial nerve VIII), which transmits balance and spatial orientation signals to the brain. The other nerves listed serve different functions: the cochlear nerve for hearing, the optic nerve for vision, and the trigeminal nerve for facial sensation and mastication.