Electrophysiological tests assess the inner ear. When the outer hair cells in the cochlea are stimulated, they not only send information onward towards the brain, but also transmit a response backwards through the ossicles and eardrum into the external ear canal. The otoacoustic emissions (OAE) test takes advantage of this fact. This type of test is also used for newborn hearing screening. The OAE test is particularly good in assessing patients with ototoxicity or acoustic trauma where damage to the outer hair cells may have occurred.
A computerized hearing test called “Auditory Brainstem Response” (ABR) audiometry is helpful in determining the site of an inner ear or brainstem hearing disorder. It’s also used to evaluate degree of hearing loss in people who can’t respond to standard hearing tests.
The inner ear and the 8th cranial nerve also include the balance (vestibular) system. Because of this, many ear diseases affect balance and can cause dizziness, imbalance, or vertigo (spinning dizziness). Tests of the balance system may be necessary to determine the cause of your hearing loss.
The vestibular (balance) system monitors the position and movements of the head to stabilize retinal images so you can see properly. This information is integrated with thevisual system. So problems with the balance system often produce involuntary movements of the eyes.
“Videonystagmography” (VNG) uses goggles that cover the face and contain a video camera to record eye movements. Posturography is a test that uses a computer to help record input to the balance system from the four components of balance: ears, eyes, muscle-joint sense (proprioception), and brain.
At House Clinic, we offer the latest electrophysiological testing to help assess and diagnose inner ear disorders.
• BERA Test:
BERA Test is conducted to determine the integrity of auditory nerve, hearing loss and its severity in those cases when it is difficult to determine hearing loss through audiometry. This test helps take a decision on the condition of auditory nerve. The test is important as it is not possible for the audiologists to move forward before determining this.
• OAE Test:
OAE Test is conducted to check if the cochlea i.e. inner ear is healthy and properly functional. Convenient location of our clinics ensures ease of success for our clients. We employ a highly qualified team of professional audiologists, each with extensive experience in all areas of hearing loss and the latest hearing instrument for the testing.
• ASSR Test:
We conduct ASSR (Unaided & Aided) Test to determine frequency specific threshold for hearing problem of the patients. We use the latest audiology equipment in diagnosing hearing loss. Professional audiologists associated with make sure that you get the best medical advice possible. Easy to access clinics help the patients reach us conveniently.
• VEMP Test:
The vestibular evoked myogenic potential (VEMP or VsEP) is a neurophysiological assessment technique used to determine the function of the otolithicorgans (utricle and saccule) of the inner ear. It complements the information provided by caloric testing and other forms of inner ear (vestibular apparatus) testing.
• ENG Test:
Electronystagmography (ENG) is a diagnostic test to record involuntary movements of the eye caused by a condition known as nystagmus. It can also be used to diagnose the cause of vertigo, dizziness or balance dysfunction by testing the vestibular system.
The caloric test is a part of the ENG. It is an attempt to discover the degree to which the vestibular system is responsive and also how symmetric the responses are, between left and right ears. It is a test of the lateral semicircular canals alone -- it does not assess vertical canal function or otolithic function.
• ECoch - G Test:
The electrocochleography test is an objective measure of the electrical potentials generated in the inner ear as a result of sound stimulation. This test is most often used to determine if the inner ear (cochlea) has an excessive amount of fluid pressure.