How do the various diagnostic tests for acoustic neuromas work?

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During a hearing test for an acoustic neuroma, you would wear headphones and listen to sounds aimed at one ear at a time. Electronystagmography, or ENG, looks for abnormal eye movements (nystagmus) that are common with inner ear problems. Brainstem auditory evoked response, or BAER, involves putting electrodes on your scalp and ears. The electrodes measure your brain's reaction to various noises. Magnetic resonance imaging, or MRI, scans your head to create an image that might show an acoustic neuroma.

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