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Auditory steady state response

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https://www.readbyqxmd.com/read/28342407/music-and-natural-sounds-in-an-auditory-steady-state-response-based-brain-computer-interface-to-increase-user-acceptance
#1
Jeong Heo, Hyun Jae Baek, Seunghyeok Hong, Min Hye Chang, Jeong Su Lee, Kwang Suk Park
Patients with total locked-in syndrome are conscious; however, they cannot express themselves because most of their voluntary muscles are paralyzed, and many of these patients have lost their eyesight. To improve the quality of life of these patients, there is an increasing need for communication-supporting technologies that leverage the remaining senses of the patient along with physiological signals. The auditory steady-state response (ASSR) is an electro-physiologic response to auditory stimulation that is amplitude-modulated by a specific frequency...
March 18, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28334175/attenuated-fast-steady-state-visual-evoked-potentials-during-human-sleep
#2
Omer Sharon, Yuval Nir
During sleep, external sensory events rarely elicit a behavioral response or affect perception. However, how sensory processing differs between wakefulness and sleep remains unclear. A major difficulty in this field stems from using brief auditory stimuli that often trigger nonspecific high-amplitude "K-complex" responses and complicate interpretation. To overcome this challenge, here we delivered periodic visual flicker stimulation across sleep and wakefulness while recording high-density electroencephalography (EEG) in humans...
February 25, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/28319881/40hz-auditory-steady-state-responses-in-patients-with-disorders-of-consciousness-correlation-between-phase-locking-index-and-coma-recovery-scale-revised-score
#3
Marek Binder, Urszula Górska, Inga Griskova-Bulanova
OBJECTIVE: We aimed to elucidate whether 40Hz auditory steady-state response (ASSR) could be sensitive to the state of patients with disorders of consciousness (DOC) as estimated with Coma Recovery Scale-Revised (CRS-R) diagnostic tool. METHODS: Fifteen DOC patients and 24 healthy controls took part in the study. The 40Hz click trains were used to evoke ASSRs. Mean evoked amplitude (EA) and phase-locking index (PLI) within 38-42Hz window were calculated for 100ms bins, starting from -200 to 700ms relative to stimulus onset...
February 28, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28291987/evaluation-of-hearing-sensitivity-in-young-adults-with-normal-hearing-using-a-40-hz-auditory-steady-state-response-with-ce-chirp
#4
Hidehiko Maeda, Eiko Tamashige, Narumi Iwasaki, Daisuke Urano, Ayaka Kanazawa
Purpose: The present study aimed to measure hearing sensitivity in young adults with normal hearing using a 40-Hz auditory steady-state response with CE-Chirp and to evaluate the speed and accuracy of this method. Method: Twelve young adults (1 man, 11 women; mean age = 22.1 ± 3.1 years) each completed two auditory steady-state response measurement sessions with CE-Chirp. The difference score was calculated at each of the four pure-tone frequencies. The measurement time and residual noise level in all stimulus levels were also determined...
March 14, 2017: American Journal of Audiology
https://www.readbyqxmd.com/read/28269548/ear-eeg-allows-extraction-of-neural-responses-in-challenging-listening-scenarios-a-future-technology-for-hearing-aids
#5
L Fiedler, J Obleser, T Lunner, C Graversen
Advances in brain-computer interface research have recently empowered the development of wearable sensors to record mobile electroencephalography (EEG) as an unobtrusive and easy-to-use alternative to conventional scalp EEG. One such mobile solution is to record EEG from the ear canal, which has been validated for auditory steady state responses and discrete event related potentials (ERPs). However, it is still under discussion where to place recording and reference electrodes to capture best responses to auditory stimuli...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269546/reference-configurations-for-ear-eeg-steady-state-responses
#6
Simon L Kappel, Christian B Christensen, Kaare B Mikkelsen, Preben Kidmose
Ear-EEG is a non-invasive EEG recording method, where EEG is recorded from electrodes placed in the ear. Ear-EEG could be implemented into hearing aids, and provide neurofeedback for e.g. objective hearing assessment through measurements of the auditory steady-state response. In cases where the objective is to measure a specific feature of an event-related potential, there will be a subject specific optimal reference configuration. This work presents a method for optimizing the reference configuration for steady-state type potentials...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269036/assessment-of-frequency-specific-auditory-steady-state-response-using-amplitude-modulation-with-2-order-exponential-envelope
#7
Pablo Cevallos-Larrea, Thobias Pereira, Wagner Santos, Silvana M Frota, Antonio F Infantosi, Roberto M Ichinose, Carlos Tierra-Criollo
This study investigated the performance of Frequency Specific Auditory Steady-State Response (FS-ASSR) detection elicited by the amplitude modulated tone with 2-order exponential envelope (AM2), using objective response detection (ORD) techniques of Spectral F-Test (SFT) and Magnitude Squared Coherence (MSC). ASSRs from 24 normal hearing adults were obtained during binaural multi-tone stimulation of amplitude-modulation (AM) and AM2 at intensities of 60, 45 and 30 dBSPL. The carrier frequencies were 500, 1000, 2000, and 4000 Hz, modulated between 77 and 105 Hz...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28258437/exploring-the-temporal-dynamics-of-sustained-and-transient-spatial-attention-using-steady-state-visual-evoked-potentials
#8
Dan Zhang, Bo Hong, Shangkai Gao, Brigitte Röder
While the behavioral dynamics as well as the functional network of sustained and transient attention have extensively been studied, their underlying neural mechanisms have most often been investigated in separate experiments. In the present study, participants were instructed to perform an audio-visual spatial attention task. They were asked to attend to either the left or the right hemifield and to respond to deviant transient either auditory or visual stimuli. Steady-state visual evoked potentials (SSVEPs) elicited by two task irrelevant pattern reversing checkerboards flickering at 10 and 15 Hz in the left and the right hemifields, respectively, were used to continuously monitor the locus of spatial attention...
March 3, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28253644/erratum-concurrent-measures-of-contralateral-suppression-of-transient-evoked-otoacoustic-emissions-and-of-auditory-steady-state-responses-j-acoust-soc-am-140-3-2027-2038-2016
#9
Ian B Mertes, Marjorie R Leek
No abstract text is available yet for this article.
February 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28227803/ear-eeg-allows-extraction-of-neural-responses-in-challenging-listening-scenarios-a-future-technology-for-hearing-aids
#10
L Fiedler, J Obleser, T Lunner, C Graversen, L Fiedler, J Obleser, T Lunner, C Graversen, J Obleser, C Graversen, L Fiedler, T Lunner
Advances in brain-computer interface research have recently empowered the development of wearable sensors to record mobile electroencephalography (EEG) as an unobtrusive and easy-to-use alternative to conventional scalp EEG. One such mobile solution is to record EEG from the ear canal, which has been validated for auditory steady state responses and discrete event related potentials (ERPs). However, it is still under discussion where to place recording and reference electrodes to capture best responses to auditory stimuli...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227801/reference-configurations-for-ear-eeg-steady-state-responses
#11
Simon L Kappel, Christian B Christensen, Kaare B Mikkelsen, Preben Kidmose, Simon L Kappel, Christian B Christensen, Kaare B Mikkelsen, Preben Kidmose, Kaare B Mikkelsen, Preben Kidmose, Christian B Christensen, Simon L Kappel
Ear-EEG is a non-invasive EEG recording method, where EEG is recorded from electrodes placed in the ear. Ear-EEG could be implemented into hearing aids, and provide neurofeedback for e.g. objective hearing assessment through measurements of the auditory steady-state response. In cases where the objective is to measure a specific feature of an event-related potential, there will be a subject specific optimal reference configuration. This work presents a method for optimizing the reference configuration for steady-state type potentials...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227250/assessment-of-frequency-specific-auditory-steady-state-response-using-amplitude-modulation-with-2-order-exponential-envelope
#12
Pablo Cevallos-Larrea, Thobias Pereira, Wagner Santos, Silvana M Frota, Antonio F Infantosi, Roberto M Ichinose, Carlos Tierra-Criollo, Pablo Cevallos-Larrea, Thobias Pereira, Wagner Santos, Silvana M Frota, Antonio F Infantosi, Roberto M Ichinose, Carlos Tierra-Criollo, Pablo Cevallos-Larrea, Wagner Santos, Silvana M Frota, Carlos Tierra-Criollo, Antonio F Infantosi, Thobias Pereira, Roberto M Ichinose
This study investigated the performance of Frequency Specific Auditory Steady-State Response (FS-ASSR) detection elicited by the amplitude modulated tone with 2-order exponential envelope (AM(2)), using objective response detection (ORD) techniques of Spectral F-Test (SFT) and Magnitude Squared Coherence (MSC). ASSRs from 24 normal hearing adults were obtained during binaural multi-tone stimulation of amplitude-modulation (AM) and AM(2) at intensities of 60, 45 and 30 dBSPL. The carrier frequencies were 500, 1000, 2000, and 4000 Hz, modulated between 77 and 105 Hz...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28202828/-diagnosis-of-cochleovestibular-neurovascular-compression-syndrome-a-scoring-system-based-on-five-clinical-characteristics
#13
Tomomi Okamura, Takafumi Nishizaki, Norio Ikeda, Shigeki Nakano, Takanori Sakakura, Natsumi Fujii, Takeshi Okuda
The optimal method for diagnosing cochleovestibular neurovascular compression syndrome(CNVC)remains controversial, and the aim of this study is to develop a standard diagnostic instrument for the condition. The clinical features of 53 sides of 50 patients with a combination of vertigo, tinnitus, and/or hearing loss were retrospectively evaluated. The following five clinical features were evaluated and given a score of 1 or 0:1)a long history of recurrent vertigo, tinnitus, or hearing loss;2)neurological findings related to positional vertigo, nystagmus, tinnitus, or hearing loss;3)neuro-otological findings involving tinnitus, audiometry, or vestibular testing;4)auditory brainstem response(ABR)evaluation with the detection of a low 25-75% II wave amplitude on the contralateral side and delayed interpeak latency in the I-III or I-V waves(usually low II wave amplitude combined with double peaks and a wide-based form)during ABR evaluation using 80 and 90dB clicks;and 5)the detection of vascular contact with the eighth cranial nerve on magnetic resonance imaging-constructive interference in steady state or air computed tomography imaging...
February 2017: No Shinkei Geka. Neurological Surgery
https://www.readbyqxmd.com/read/28188855/auditory-processing-assessment-suggests-that-wistar-audiogenic-rat-neural-networks-are-prone-to-entrainment
#14
Hyorrana Priscila Pereira Pinto, Vinícius Rezende Carvalho, Daniel de Castro Medeiros, Ana Flávia Santos Almeida, Eduardo Mazoni Andrade Marçal Mendes, Márcio Flávio Dutra Moraes
Epilepsy is a neurological disease related to the occurrence of pathological oscillatory activity, but the basic physiological mechanisms of seizure remain to be understood. Our working hypothesis is that specific sensory processing circuits may present abnormally enhanced predisposition for coordinated firing in the dysfunctional brain. Such facilitated entrainment could share a similar mechanistic process as those expediting the propagation of epileptiform activity throughout the brain. To test this hypothesis, we employed the Wistar audiogenic rat (WAR) reflex animal model, which is characterized by having seizures triggered reliably by sound...
April 7, 2017: Neuroscience
https://www.readbyqxmd.com/read/28164933/using-auditory-steady-state-responses-for-measuring-hearing-protector-attenuation
#15
Olivier Valentin, Sasha M John, Frédéric Laville
INTRODUCTION: Present methods of measuring the attenuation of hearing protection devices (HPDs) have limitations. Objective measurements such as field microphone in real-ear do not assess bone-conducted sound. Psychophysical measurements such as real-ear attenuation at threshold (REAT) are biased due to the low frequency masking effects from test subjects' physiological noise and the variability of measurements based on subjective responses. An auditory steady-state responses (ASSRs) procedure is explored as a technique which might overcome these limitations...
January 2017: Noise & Health
https://www.readbyqxmd.com/read/28161286/meg-and-eeg-demonstrate-similar-test-retest-reliability-of-the-40hz-auditory-steady-state-response
#16
Kristina T Legget, Allison K Hild, Sarah E Steinmetz, Steven T Simon, Donald C Rojas
The auditory steady-state response (ASSR) is increasingly being used as a biomarker in neuropsychiatric disorders, but research investigating the test-retest reliability of this measure is needed. We previously reported ASSR reliability, measured by electroencephalography (EEG), to 40Hz amplitude-modulated white noise and click train stimuli. The purpose of the current study was to (a) assess the reliability of the MEG-measured ASSR to 40Hz amplitude-modulated white noise and click train stimuli, and (b) compare test-retest reliability between MEG and EEG measures of ASSR, which has not previously been investigated...
April 2017: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/28110090/spatiotemporal-reconstruction-of-auditory-steady-state-responses-to-acoustic-amplitude-modulations-potential-sources-beyond-the-auditory-pathway
#17
Ehsan Darestani Farahani, Tine Goossens, Jan Wouters, Astrid van Wieringen
Investigating the neural generators of auditory steady-state responses (ASSRs), i.e., auditory evoked brain responses, with a wide range of screening and diagnostic applications, has been the focus of various studies for many years. Most of these studies employed a priori assumptions regarding the number and location of neural generators. The aim of this study is to reconstruct ASSR sources with minimal assumptions in order to gain in-depth insight into the number and location of brain regions that are activated in response to low- as well as high-frequency acoustically amplitude modulated signals...
January 18, 2017: NeuroImage
https://www.readbyqxmd.com/read/28109832/a-novel-hybrid-auditory-bci-paradigm-combining-assr-and-p300
#18
Netiwit Kaongoen, Sungho Jo
BACKGROUND: Brain-computer interface (BCI) is a technology that provides an alternative way of communication by translating brain activities into digital commands. Due to the incapability of using the vision-dependent BCI for patients who have visual impairment, auditory stimuli have been used to substitute the conventional visual stimuli. NEW METHOD: This paper introduces a hybrid auditory BCI that utilizes and combines auditory steady state response (ASSR) and spatial-auditory P300 BCI to improve the performance for the auditory BCI system...
January 18, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28107359/sustained-cortical-and-subcortical-measures-of-auditory-and-visual-plasticity-following-short-term-perceptual-learning
#19
Bonnie K Lau, Dorea R Ruggles, Sucharit Katyal, Stephen A Engel, Andrew J Oxenham
Short-term training can lead to improvements in behavioral discrimination of auditory and visual stimuli, as well as enhanced EEG responses to those stimuli. In the auditory domain, fluency with tonal languages and musical training has been associated with long-term cortical and subcortical plasticity, but less is known about the effects of shorter-term training. This study combined electroencephalography (EEG) and behavioral measures to investigate short-term learning and neural plasticity in both auditory and visual domains...
2017: PloS One
https://www.readbyqxmd.com/read/28043881/simultaneously-evoked-auditory-potentials-seap-a-new-method-for-concurrent-measurement-of-cortical-and-subcortical-auditory-evoked-activity
#20
Christopher Slugocki, Daniel Bosnyak, Laurel J Trainor
Recent electrophysiological work has evinced a capacity for plasticity in subcortical auditory nuclei in human listeners. Similar plastic effects have been measured in cortically-generated auditory potentials but it is unclear how the two interact. Here we present Simultaneously-Evoked Auditory Potentials (SEAP), a method designed to concurrently elicit electrophysiological brain potentials from inferior colliculus, thalamus, and primary and secondary auditory cortices. Twenty-six normal-hearing adult subjects (mean 19...
December 31, 2016: Hearing Research
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