An acoustic neuroma (also called Vestibular Schwannoma) is a non-cancerous growth that arises from the eighth cranial nerve.
The eighth (VIII) cranial nerve has two divisions: 1) the cochlear division – associated with transmitting hearing 2) the vestibular division – associated with sending balance information from the inner ear to the brain. These two parts pass through a bony canal called the internal auditory canal to reach the brain. The seventh (VII) cranial nerve (also called the Facial Nerve as it controls facial movements) and important blood vessels also pass through this canal. It is here that acoustic neuromas usually begin to grow from the tissue surrounding the vestibular division of the eighth cranial nerve.
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