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Surface-recorded auditory nerve and brain stem responses are being used routinely for diagnostic purposes in man. When interest is in auditory diagnosis, the electric response threshold is of primary importance. However, when used in neurological diagnosis, the wave form of the response is important. As a measure of one aspect of response wave form, this(More)
In order to study the sources and pathways which are responsible for the frequency following response (FFR), records were made in control subjects and in patients with special types of lesion and response. It has already been shown that the FFR in normal subjects to tone bursts with single onset phases is made up of a short latency cochlear microphonic(More)
Click stimuli have been used to elicit ABR in auditory diagnosis but the ABR response is dominated by the activity of high-frequency nerve fibres and it is therefore impossible to deduce hearing at lower frequencies from ABR to clicks. Short tone pips or filtered clicks are also inadequate since the response is still dominated by basal turn, high-frequency(More)
When auditory nerve-brainstem evoked responses are used in neurological diagnosis, an important response parameter to be evaluated is brainstem transmission time - the time interval between the auditory nerve response (wave 1) and the response from the rostal brainstem (wave P4). Occasionally the only response wave present is wave P4 and its latency is(More)
Die Latenz der Hörnervenantwort ist bei Schalleitungsschwerhörigkeit ebenso verlängert wie die der Hirnstammantwort bei den meisten retrocochleären Schwerhörigkeiten. Der Effekt des sensorineuralen Hörverlustes auf die Latenz der Hörnervenantwort ist dagegen nicht klar. Deshalb wurden die Hörnerven-Hirnstammantworten bei Normalhörigen und bei Patienten mit(More)
In order to complement the high-frequency auditory brain stem responses obtained in response to click acoustic stimuli, attempts have been made to elicit low-frequency responses by using low-frequency filtered clicks. The adequacy of these low-frequency stimuli was tested in patients with low-frequency hearing loss, and it was found that the electric(More)
In order to determine the region along the basilar membrane which contributes to the recorded CM, an attempt was made to record CM responses in subjects with normal hearing and in subjects with high frequency cochlear hearing losses (e.g. acoustic trauma). In such cases of high frequency hearing loss, one may assume that damage has occurred to the hair(More)
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