Auditory Brainstem Response Audiometry: From 1 Different Sources
(ABR audiometry, brainstem evoked response audiometry, BSER) an objective test of hearing that measures the electrical activity in the auditory nerve and *brainstem following sound stimulation using repeated clicks or brief tones.
See VESTIBULOCOCHLEAR NERVE.... auditory nerve
The testing of hearing.... audiometry
The number of completed or returned survey instruments (questionnaires, interviews, etc) divided by the total number of persons who would have been surveyed if all had participated. Usually expressed as a percentage.... response rate
Stimulation of the retina of the EYE with light causes changes in the electrical activity of the cerebral cortex (see BRAIN). These changes can be measured from outside the skull and can give valuable information about the state of the visual pathway from the retinal ganglion cells to the occipital cortex. Not only can it determine that function is normal, it can also help to diagnose some causes of poor VISION.... visual evoked response
Arousal of the sympathetic part of the autonomic nervous system in response to fear but which also occurs in anxiety disorders. Adrenaline (epinephrine), noradrenaline (norepinephrine), and other hormones are released from the adrenal glands and nervous system, leading to a raised heart-rate, pupil dilation, and increased blood flow to the muscles. These effects make the body more efficient in either fighting or fleeing the apparent danger.... fight-or-flight response
A hearing test used to investigate the middle ear in cases of conductive deafness.... impedance audiometry
adj. relating to the ear or to the sense of hearing.... auditory
a device similar to a *cochlear implant except that the electrode stimulates the auditory parts of the *brainstem rather than the cochlea. It is used to restore hearing of profoundly deaf people who have had damage to both auditory nerves and are hence unsuitable for cochlear implantation. It consists of an electrode that is permanently implanted on the surface of the brainstem. An external device with a microphone and an electronic processing unit pass information to the electrode using radio-frequency waves. The implant is powered by batteries in the external part of the device. It is most commonly used in patients with *neurofibromatosis type II who have had bilateral *vestibular schwannomas.... auditory brainstem implant
(auditory meatus) the canal leading from the pinna to the eardrum.... auditory canal
see auditory neuropathy spectrum disorder.... auditory dyssynchrony
(auditory neuropathy, auditory dyssynchrony) a form of hearing loss characterized by normal cochlear function as measured by *otoacoustic emissions or detection of *cochlear microphonics but abnormal or absent *middle ear reflexes and abnormal *auditory brainstem responses.... auditory neuropathy spectrum disorder
(APD, central auditory processing disorder, CAPD) a series of conditions characterized by difficulty in hearing and processing auditory information, especially in poor acoustic environments, despite normal or near-normal ear function. It may be due to genetic factors, maturational delay in the central nervous system, or focal abnormalities of the central nervous system (such as tumours). Treatments include *hearing therapy, *auditory skills training, educational support, use of *assistive listening devices, and training with computerized therapy tools.... auditory processing disorder
a method of teaching people to use their hearing to its best potential, undertaken in the treatment of *auditory processing disorder.... auditory skills training
(ASSR) an objective test of hearing that measures the electrical activity in the auditory nerve and *brainstem following sound stimulation using a modulated continuous tone.... auditory steady state response
(AVT) a technique for teaching deaf children to communicate that focuses on speech and residual hearing rather than sign language.... auditory verbal therapy
(BRM) a therapeutic agent, such as *interferon or *interleukin, that influences the body’s defence mechanisms to act against infection and disease. In small amounts, these substances are produced naturally by the body; larger doses have been genetically developed for use against rheumatoid arthritis, hepatitis, and cancer (especially melanoma and renal cancer).... biological response modifier
see auditory brainstem response audiometry.... brainstem evoked response audiometry
see auditory processing disorder.... central auditory processing disorder
(CHAPS) a questionnaire designed to assess children’s hearing abilities in certain situations. It is used in the diagnosis of *auditory processing disorder.... children’s auditory performance scale
(CERA) an objective test of hearing that measures the electrical activity in the *cerebral cortex following sound stimulation.... cortical evoked response audiometry
... immuno- combining form denoting immunity or immunological response.
(OAD, King–Kopetzky syndrome) hearing difficulty, especially in noisy environments, in an individual with a normal *audiogram: a form of *auditory processing disorder. Treatment includes *hearing therapy.... obscure auditory dysfunction
n. the way in which the body or part of the body reacts to a *stimulus. For example, a nerve impulse may produce the response of a contraction in a muscle that the nerve supplies.... response
a form of *behaviour therapy given for severe *obsessions. Patients are encouraged to abstain from rituals and repetitive acts while they are in situations that arouse anxiety. For example, a hand-washing ritual might be treated by stopping washing while being progressively exposed to dirt. The anxiety then declines, and with it the obsessions.... response prevention
see shock.... systemic inflammatory response
(visual reinforced audiometry, VRA) a behavioural test of hearing for children aged approximately 6 to 30 months in which the subject sits between two calibrated loudspeakers. A sound is generated from one loudspeaker. Children who turn towards the sound are rewarded by brief illumination of a toy adjacent to the loudspeaker. Older children can be tested with headphones, rather than using the loudspeakers, to enable each ear to be tested separately. The test can be adapted for use with older subjects who have learning disabilities.... visual reinforcement audiometry
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