2023 The electric charge stimulates the auditory nerve. Jennifer Ouellette, Ars Technica, 22 Mar. ![]() 2011 Beethoven-Haus Bonn An autopsy identified severe liver damage (evidence of cirrhosis) as the likely cause of death and significant dilation of the auditory nerve. Christopher Linstrom, Discover Magazine, 31 Jan. March 31, 2021.Recent Examples on the Web For the middle ear muscle reflex, the afferent limb is the auditory nerve the efferent limb is the facial nerve for the stapedius muscle and the trigeminal nerve for the tensor tympani muscle. Acoustic neuroma and other skull base tumors. In: Current Diagnosis & Treatment in Otolaryngology - Head & Neck Surgery. Vestibular schwannoma (acoustic neuroma). Rochester, Minn.: Mayo Foundation for Medical Education and Research 2019. National Institute on Deafness and Other Communication Disorders. Vestibular schwannoma (acoustic neuroma) and neurofibromatosis.In this case, fluid can build up in your head (hydrocephalus), increasing the pressure inside your skull. ![]() Large tumors may press on your brainstem, preventing the normal flow of fluid between your brain and spinal cord (cerebrospinal fluid). ComplicationsĪn acoustic neuroma may cause a variety of permanent complications, including: Each child of an affected parent has a 50-50 chance of inheriting it. Neurofibromatosis type 2 (NF2) is known as an autosomal dominant disorder, meaning that the mutation can be passed on by just one parent (dominant gene). ![]() However, neurofibromatosis type 2 only accounts for about 5% of acoustic neuroma cases.Ī hallmark characteristic of neurofibromatosis type 2 is the development of noncancerous tumors on the hearing and balance nerves on both sides of the head, as well as on other nerves. The only confirmed risk factor for acoustic neuroma is having a parent with the rare genetic disorder neurofibromatosis type 2. The person has a 50% chance of having an unaffected child. A person with an autosomal dominant disorder - in this example, the father - has a 50% chance of having an affected child with one changed gene. You need only one changed gene to be affected by this type of disorder. It's located on one of the nonsex chromosomes, called autosomes. In an autosomal dominant disorder, the changed gene, also called a mutation, is a dominant gene. See your doctor if you notice hearing loss in one ear, ringing in your ear or trouble with your balance.Įarly diagnosis of an acoustic neuroma may help keep the tumor from growing large enough to cause serious consequences, such as total hearing loss. In rare cases, an acoustic neuroma may grow large enough to compress the brainstem and become life-threatening.
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