scholarly journals Effects of degree and symmetricity of bilateral spectral smearing, carrier frequency, and subject sex on amplitude of evoked auditory steady-state response signal

2018 ◽  
Vol 13 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Jong Ho Hwang ◽  
Kyoung Won Nam ◽  
Dong Pyo Jang ◽  
In Young Kim
Keyword(s):  
Steady State ◽  
Carrier Frequency ◽  
Steady State Response ◽  
Response Signal ◽  
State Response ◽  
Auditory Steady State Response ◽  
Spectral Smearing

Air-Conduction Auditory Steady-State Response: Comparison of Interchannel Recording Using Two Modulation Frequencies

2008 ◽  
Vol 19 (09) ◽  
pp. 696-707 ◽  
Author(s):  
Wafaa A. Kaf ◽  
Ali A. Danesh
Keyword(s):  
Steady State ◽  
Carrier Frequency ◽  
Young Female ◽  
Response Amplitude ◽  
Normal Female ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response ◽  
The Mean ◽  
Contralateral Response

Background: Two-channel auditory steady-state response (ASSR) recording at high and low MF (modulation frequency) most likely provides an insight about the response amplitude and latency from different directions at the brainstem level and at the thalamus or cortical level. Little is known about the combined relationship between MF (39 and 79 Hz) and electrode montages (ipsilateral and contralateral) to single AM (amplitude modulation) tones on the ASSR amplitude and latency. Purpose: To determine if ipsilateral versus contralateral response asymmetries are present at the brainstem level (79 Hz ASSR) and at the thalamus or cortical levels (39 Hz ASSR). Research Design: Descriptive and inferential statistics for interchannel ipsilateral and contralateral ASSR amplitude and latency to 79 and 39 Hz. Study Sample: Twenty-five normal-hearing, right-handed young female adults participated in the study. All participants were right-handed, and their age ranged between 18 to 28 years (mean 24.5 ± 1.6 years). Data Collection and Analysis: Ipsilateral and contralateral ASSR to 39 and 79 Hz MF and 100% AM stimuli were recorded at 500, 2000, and 4000 Hz carrier frequencies at 65 dB SPL. The ASSR amplitudes and phases were determined for each MF across Fc (carrier frequency) for the two channels to the test (right) ear. ASSR amplitude and latency between recording montages for each MF and across carrier frequency were compared by computing two-way repeated measures ANOVA. Results: The mean ipsilateral ASSR amplitudes to 39 Hz across frequency were slightly larger (228.6 ± 61.6 µV) than the contralateral response amplitude (223.2 ± 78 µV) while the mean ipsilateral 79 Hz amplitudes were smaller (127.3 ± 114.8) compared to contralateral 79 Hz amplitude (154.6 ± 112.7 µV). For latency response, the mean ipsilateral/contralateral latency difference, on average, was 1 msec or less for both MFs. Results, in normal female adults, indicated no significant interchannel ASSR asymmetries for amplitude and latency (p > 0.05) at the brainstem (79 Hz ASSR) and at the thalamus or cortical levels (39 Hz ASSR). Conclusions: Interchannel ipsilateral and contralateral ASSR amplitude and latency to 79 and 39 Hz are not significantly different in normal, young female adults. Two-channel recording of ASSR to different MFs may be of clinical value in otoneurologic assessment.

scholarly journals Effects of spectral smearing of stimuli on the performance of auditory steady-state response-based brain–computer interface

2017 ◽  
Vol 11 (6) ◽  
pp. 515-527 ◽  
Author(s):  
Jong Ho Hwang ◽  
Kyoung Won Nam ◽  
Dong Pyo Jang ◽  
In Young Kim
Keyword(s):  
Steady State ◽  
Brain Computer Interface ◽  
Computer Interface ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response ◽  
Spectral Smearing

The Usefulness of Sound-Field Auditory Steady State Response (SF ASSR): Comparison of Hearing Sensitivity and Typical ASSR

2013 ◽  
Vol 9 (1) ◽  
pp. 15-24
Author(s):  
Eun Sun Park ◽  
Junghwa Bahng ◽  
Hyo-Jeong Lee ◽  
Hyung-Jong Kim
Keyword(s):  
Steady State ◽  
Sound Field ◽  
Steady State Response ◽  
Hearing Sensitivity ◽  
State Response ◽  
Auditory Steady State Response

The Auditory Steady-State Response: Full-Term and Premature Neonates

2002 ◽  
Vol 13 (05) ◽  
pp. 260-269 ◽  
Author(s):  
Barbara Cone-Wesson ◽  
John Parker ◽  
Nina Swiderski ◽  
Field Rickards
Keyword(s):  
Steady State ◽  
Premature Infants ◽  
Modulation Frequency ◽  
Otoacoustic Emission ◽  
Full Term ◽  
Steady State Response ◽  
Pass Rates ◽  
Term Infants ◽  
State Response ◽  
Auditory Steady State Response

Two studies were aimed at developing the auditory steady-state response (ASSR) for universal newborn hearing screening. First, neonates who had passed auditory brainstem response, transient evoked otoacoustic emission, and distortion-product otoacoustic emission tests were also tested with ASSRs using modulated tones that varied in frequency and level. Pass rates were highest (> 90%) for amplitude-modulated tones presented at levels ≥ 69 dB SPL. The effect of modulation frequency on ASSR for 500- and 2000-Hz tones was evaluated in full-term and premature infants in the second study. Full-term infants had higher pass rates for 2000-Hz tones amplitude modulated at 74 to 106 Hz compared with pass rates for a 500-Hz tone modulated at 58 to 90 Hz. Premature infants had lower pass rates than full-term infants for both carrier frequencies. Systematic investigation of ASSR threshold and the effect of modulation frequency in neonates is needed to adapt the technique for screening.

The Auditory Steady-State Response

2002 ◽  
Vol 13 (04) ◽  
pp. i-i
Author(s):  
James Jerger
Keyword(s):  
Steady State ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response

Decreased Gamma Auditory Steady-State Response Is Associated With Impaired Real-World Functioning in Unmedicated Patients at Clinical High Risk for Psychosis

2020 ◽  
pp. 155005942098270
Author(s):  
Sarah Ahmed ◽  
Jennifer R. Lepock ◽  
Romina Mizrahi ◽  
R. Michael Bagby ◽  
Cory J. Gerritsen ◽  
...  
Keyword(s):  
Steady State ◽  
High Risk ◽  
Functional Impairment ◽  
Real World ◽  
Steady State Response ◽  
Clinical High Risk ◽  
State Response ◽  
Auditory Steady State Response ◽  
Gamma Synchrony ◽  
40 Hz

Aim Deficits in synchronous, gamma-frequency neural oscillations may contribute to schizophrenia patients’ real-world functional impairment and can be measured electroencephalographically using the auditory steady-state response (ASSR). Gamma ASSR deficits have been reported in schizophrenia patients and individuals at clinical high risk (CHR) for developing psychosis. We hypothesized that, in CHR patients, gamma ASSR would correlate with real-world functioning, consistent with a role for gamma synchrony deficits in functional impairment. Methods A total of 35 CHR patients rated on Global Functioning: Social and Role scales had EEG recorded while listening to 1-ms, 93-dB clicks presented at 40 Hz in 500-ms trains, in response to which 40-Hz evoked power and intertrial phase-locking factor (PLF) were measured. Results In CHR patients, lower 40-Hz PLF correlated with lower social functioning. Conclusions Gamma synchrony deficits may be a biomarker of real-world impairment at early stages of the schizophrenia disease trajectory.

scholarly journals 40 Hz Auditory steady-state response and EEG spectral edge frequency during sufentanil anaesthesia

1998 ◽  
Vol 45 (2) ◽  
pp. 115-121 ◽  
Author(s):  
I. Gilron ◽  
G. Plourde ◽  
W. Marcantoni ◽  
F. Varin
Keyword(s):  
Steady State ◽  
Steady State Response ◽  
Spectral Edge Frequency ◽  
State Response ◽  
Spectral Edge ◽  
Auditory Steady State Response ◽  
40 Hz

40 Hz auditory steady-state response in schizophrenia: Sensitivity to stimulation type (clicks versus flutter amplitude-modulated tones)

2018 ◽  
Vol 662 ◽  
pp. 152-157 ◽  
Author(s):  
Inga Griskova-Bulanova ◽  
Kastytis Dapsys ◽  
Sigita Melynyte ◽  
Aleksandras Voicikas ◽  
Valentinas Maciulis ◽  
...  
Keyword(s):  
Steady State ◽  
Steady State Response ◽  
State Response ◽  
Auditory Steady State Response ◽  
40 Hz
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