<s>[INST] I can t keep my balance when I close my eyes, and sometimes loud sours can cause my balance loss, and other times I feel movement in my brain. I had neurologist tell me there s nothing wrong in my brain. But I have a herniated disk that is pressing against a nerve in my spine. ENT doctors say I need a test of my inner ear. [/INST] Hi,Thanks for writing in.Balance mechanism of the body is maintained by the cerebellum in back of the brain and vestibular apparatus in the inner ears. Since you have consulted your neurologist and made it certain after clinical examination and CT scan or MRI scan therefore the cerebellum should be normal. I feel your vestibular apparatus in both inner ears require testing just as your ENT doctors have said. It might help if you get Electronystagmography (ENG) or videonystagmography (VNG) done to record abnormal eye movements while your head is placed in different positions or your balance organs are stimulated with water or air. </s>