Hyperacusis is found to be associated with both peripheral and central factors. Hyperacusis is often accompanied by a cochlear hearing loss, and this usually involves damage to cochlear hair cells and subsequent auditory nerve degeneration. However, annoyance, fear, and pain hyperacusis must involve central mechanisms. Hyperacusis is a co morbid condition of various other medical conditions that are either peripheral or central factors. Hyperacusis is found in Bell’s palsy, Ménière’s disease, perilymph fistula, superior semicircular canal dehiscence, acoustic trauma, barotrauma, noise-induced hearing loss, stapedectomy, tympanoplasty, Autism, carotid aneurysm, middle cerebral aneurysm, head injury, multiple sclerosis, migraine, epilepsy, myasthenia …show more content…
These physical examinations will enable the clinician to understand to an extent the presence of hyperacusis and its effect on daily living. The presence of a clicking or popping sound during chewing, jaw locking, and changes in the biting pattern and dental occlusion are likely to indicate the presence of temporomandibular dysfunction, which has been linked with hyperacusis. Patients with superior canal dehiscence (SCD) syndrome experience vertigo and hyperacusis to bone-conducted sounds. (Burris, Evans, & Carlson, 2010; Hilgenberg, Saldanha, Cunha, Rubo, & Conti, 2012). Laboratory Evaluation Blood tests can include a whole blood count and measures of sodium, potassium, thyroid stimulating hormone, and free thyroxine, useful in screening for infections and endocrinological diseases. Deficiencies in magnesium and Vitamin B6 levels can cause syndromes linked to neural hyperactivity. Serological tests, which measure the levels of specific antibodies in the blood, are used to diagnose diseases linked with hyperacusis, such as syphilis, herpes zoster, and Lyme disease. Imaging