Short-Term Habituation of the Infant Auditory Evoked Response

1973 ◽  
Vol 16 (4) ◽  
pp. 637-641 ◽  
Author(s):  
Michael F. Dorman ◽  
Robert Hoffmann
Keyword(s):  
Evoked Response ◽  
Synthetic Speech ◽  
Evoked Responses ◽  
Stimulus Amplitude ◽  
Average Amplitude ◽  
Short Term ◽  
Speech Stimuli ◽  
Auditory Evoked Response ◽  
Stimulus Train

Short-term habituation of the vertex auditory evoked response was studied in six infants (age 10 to 14 weeks). The infants were presented trains of four synthetic speech stimuli. The average amplitude of the evoked responses was largest to the first member of the stimulus train and then decreased rapidly. The average amplitudes to the second, third, and fourth stimuli in the train were 36, 41, and 22% of the first stimulus amplitude, respectively. The results suggest that the auditory evoked response of awake infants satisfies several of the criteria for short-term habituation.

Masking Level Differences: Auditory Evoked Responses with Homophasic and Antiphasic Signal and Noise

1979 ◽  
Vol 22 (2) ◽  
pp. 403-411 ◽  
Author(s):  
A. Yonovitz ◽  
C. L. Thompson ◽  
Joseph Lozar
Keyword(s):  
Pure Tone ◽  
Evoked Response ◽  
Evoked Responses ◽  
Auditory Evoked Responses ◽  
Auditory Evoked Response ◽  
Level Difference ◽  
Masking Level Difference ◽  
Objective Quantification

Two studies were devised to determine if objective quantification of the masking level difference is possible using the auditory evoked response (AER). In the first study, click stimuli were presented under three conditions: both the stimulus and masker in phase (SoNo); stimulus in phase, masker antiphasic (SoN π ); and stimulus antiphasic with masker in phase (S π No). In the second study 1000 Hz pure-tone stimuli were presented under SoNo and S π No phasic conditions. AER’s were obtained at various intensity levels for each condition. The AER demonstrated differences in N 1 -P 2 amplitudes evoked by the homophasic and antiphasic conditions for threshold and suprathreshold levels.

The effects of deep barbiturate coma on multimodality evoked potentials

1982 ◽  
Vol 57 (2) ◽  
pp. 178-185 ◽  
Author(s):  
Leslie N. Sutton ◽  
Tim Frewen ◽  
Roger Marsh ◽  
Jurg Jaggi ◽  
Derek A. Bruce
Keyword(s):  
Brain Stem ◽  
Evoked Response ◽  
Association Cortex ◽  
High Dose ◽  
Conduction Time ◽  
Evoked Responses ◽  
Barbiturate Coma ◽  
Content Type ◽  
Auditory Evoked Response ◽  
Single Positive

✓ The authors report their investigation of the effects of high-dose barbiturates on the multimodality evoked response in 9 cats. After baseline evoked responses were obtained, boluses of pentobarbital were infused intravenously at regular intervals, amounting to cumulative total doses of 9, 18, 27, 45, 63, 123, and 183 mg/kg at respective infusions. This resulted in gradually increasing serum pentobarbital levels, reaching therapeutic coma levels (4 to 5 mg/dl) after the fifth infusion. At this point, the electroencephalogram was flat, and pressor agents were required to maintain cardiovascular stability. Evoked responses were obtained 15 minutes after each infusion. Brain-stem auditory evoked response (BAER) showed little change in wave latencies at therapeutic coma levels of pentobarbital. Further barbiturates resulted in delay of the late components of this response. In the somatosensory evoked responses (SER), early brain-stem components were relatively unaffected by therapeutic coma levels. Late brain-stem components and the initial cortical response showed progressive latency increase. Late cortical (association cortex) waves were abolished at relatively low doses. The central conduction time was relatively unaffected. The late waves of the visual evoked responses (VER) were abolished with low-dose barbiturates (9 mg/kg). A single positive-negative complex persisted despite massive infusions. It is concluded that evoked responses may prove useful in monitoring patients in deep barbiturate coma, but barbiturate effects must be kept in mind.

Brainstem auditory evoked responses in rats with experimental chronic renal failure

1989 ◽  
Vol 76 (4) ◽  
pp. 415-417 ◽  
Author(s):  
Y. Shvili ◽  
U. Gafter ◽  
Y. Zohar ◽  
Y. P. Talmi ◽  
J. Levi
Keyword(s):  
Renal Failure ◽  
Chronic Renal Failure ◽  
Evoked Response ◽  
Evoked Responses ◽  
Neural Conduction ◽  
Auditory Evoked Responses ◽  
Auditory Evoked Response ◽  
Acoustic Nerve ◽  
Brainstem Auditory Evoked Response

1. Chronic renal failure was induced in rats by five-sixths nephrectomy. Brainstem auditory evoked response (BAER) was recorded after 3 months. 2. In the uraemic rats latency of the first wave was delayed, while the interpeak I-V latency was similar to that of the controls. 3. These results suggest a delayed neural conduction along the acoustic nerve or cochlear changes in uraemic rats.

P33-16 Auditory evoked response of speech stimuli in 3- to 4-year-old children: a magnetoencephalography study

2010 ◽  
Vol 121 ◽  
pp. S302-S303
Author(s):  
Y. Yoshimura ◽  
M. Kikuchi ◽  
G.B. Remijn ◽  
K. Nagao ◽  
K. Shitamichi ◽  
...  
Keyword(s):  
Evoked Response ◽  
Speech Stimuli ◽  
Auditory Evoked Response
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