scholarly journals Electrical neuroimaging during auditory motion aftereffects reveals that auditory motion processing is motion sensitive but not direction selective

2013 ◽  
Vol 109 (2) ◽  
pp. 321-331 ◽  
Author(s):  
David A. Magezi ◽  
Karin A. Buetler ◽  
Leila Chouiter ◽  
Jean-Marie Annoni ◽  
Lucas Spierer
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Right Hemisphere ◽  
Prolonged Exposure ◽  
Motion Processing ◽  
Auditory Motion ◽  
Global Field Power ◽  
Significant Difference ◽  
Electrical Neuroimaging ◽  
Motion Detectors

Following prolonged exposure to adaptor sounds moving in a single direction, participants may perceive stationary-probe sounds as moving in the opposite direction [direction-selective auditory motion aftereffect (aMAE)] and be less sensitive to motion of any probe sounds that are actually moving (motion-sensitive aMAE). The neural mechanisms of aMAEs, and notably whether they are due to adaptation of direction-selective motion detectors, as found in vision, is presently unknown and would provide critical insight into auditory motion processing. We measured human behavioral responses and auditory evoked potentials to probe sounds following four types of moving-adaptor sounds: leftward and rightward unidirectional, bidirectional, and stationary. Behavioral data replicated both direction-selective and motion-sensitive aMAEs. Electrical neuroimaging analyses of auditory evoked potentials to stationary probes revealed no significant difference in either global field power (GFP) or scalp topography between leftward and rightward conditions, suggesting that aMAEs are not based on adaptation of direction-selective motion detectors. By contrast, the bidirectional and stationary conditions differed significantly in the stationary-probe GFP at 200 ms poststimulus onset without concomitant topographic modulation, indicative of a difference in the response strength between statistically indistinguishable intracranial generators. The magnitude of this GFP difference was positively correlated with the magnitude of the motion-sensitive aMAE, supporting the functional relevance of the neurophysiological measures. Electrical source estimations revealed that the GFP difference followed from a modulation of activity in predominantly right hemisphere frontal-temporal-parietal brain regions previously implicated in auditory motion processing. Our collective results suggest that auditory motion processing relies on motion-sensitive, but, in contrast to vision, non-direction-selective mechanisms.

scholarly journals Multimodal evoked potentials and the ovarian cycle in young ovulating women

2000 ◽  
Vol 58 (2B) ◽  
pp. 418-423 ◽  
Author(s):  
LUIZ ANTONIO DE LIMA RESENDE ◽  
MARIA DORVALINA SILVA ◽  
FABÍOLA IMPEMBA ◽  
NÍDIA BORGES ACHÔA ◽  
ARTHUR OSCAR SCHELP
Keyword(s):  
Statistical Analysis ◽  
Menstrual Cycle ◽  
Evoked Potentials ◽  
Visual Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Brainstem Auditory Evoked Potentials ◽  
Significant Difference ◽  
Multimodal Evoked Potentials ◽  
Cerebral Physiology ◽  
Neurophysiological Basis

There is controversy over how hormonal conditions influence cerebral physiology. We studied pattern-shift visual evoked potentials (PS-VEP), brain stem auditory evoked potentials (BAEP) and short-latency somatosensory evoked potentials (SSEV) in 20 female volunteers at different phases of the menstrual cycle (estrogen phase, ovulatory day and progesterone phase). Statistical analysis showed decreased latencies for P100 (PS-VEP), N19 and P22 (SSEV) waves in the progesterone phase compared with the estrogen phase. There was no significant difference between the estrogen and the ovulation day values. Comparing the three above stages, there were no significant differences in the brainstem auditory evoked potentials. The reduction of the latencies of the potentials generated in multisynaptic circuits provides the first consistent neurophysiological basis for a tentative comprehension of human pre-menstrual syndrome.

scholarly journals Effects of stimulation intensity, gender and handedness upon auditory evoked potentials

1992 ◽  
Vol 50 (1) ◽  
pp. 43-49 ◽  
Author(s):  
Susana Camposano ◽  
Fernando Lolas
Keyword(s):  
Corpus Callosum ◽  
Evoked Potentials ◽  
Stimulus Intensity ◽  
Auditory Evoked Potentials ◽  
Right Hemisphere ◽  
Cognitive Components ◽  
Left Handed ◽  
And Gender ◽  
The Right ◽  
Cortical Auditory Evoked Potentials

Left handers and women show less anatomical brain asymmetry, larger corpus callosum and more bilateral representation of specific functions. Sensory and cognitive components of cortical auditory evoked potentials (AEF) have been shown to be asymmetric in right handed males and to be influenced by stimulus intensity. In this study the influence of sex, handedness and stimulus intensity upon AEP components is investigated under basal conditions of passive attention. 14 right handed males, 14 right handed females, 14 left handed males, and 14 left handed females were studied while lying awake and paying passive attention to auditory stimulation (series of 100 binaural clicks, duration 1 msec, rate 1/sec, at four intensities). Cz, C3 and C4 referenced to linked mastoids and right EOG were recorded. Analysis time was 400 msec, average evoked potentials were based on 100 clicks. Stimulus intensity and gender affect early sensory components (P1N1 and N1P2) at central leads, asymmetry is influenced only by handedness, right handers showing larger P1N1 amplitudes over the right hemisphere.

scholarly journals Analysis of the Effect of Musical Stimulation on Cortical Auditory Evoked Potentials

2018 ◽  
Vol 23 (01) ◽  
pp. 031-035
Author(s):  
Daiane Lima ◽  
Simone Regaçone ◽  
Anna Oliveira ◽  
Yara Alcântara ◽  
Eduardo Chagas ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
Auditory System ◽  
Repeated Measures ◽  
Auditory Evoked Potentials ◽  
P Value ◽  
Mixed Analysis ◽  
Sphericity Test ◽  
Significant Difference ◽  
Healthy Female ◽  
Cortical Auditory Evoked Potentials

Introduction Cortical auditory evoked potentials (CAEPs) are bioelectric responses that occur from acoustic stimulations, and they assess the functionality of the central auditory system. Objective The objective of the present study was to analyze the effect of musical stimulation on CAEPs. Methods The sample consisted of 42 healthy female subjects, aged between 18 and 24 years, divided into two groups – G1: without musical stimulation prior to the CAEP examination; and G2: with stimulation prior to the examination. In both groups, as a pre-collection procedure, the complete basic audiological evaluation was performed. For the musical stimulation performed in G2, we used an MP4 player programmed to play Pachelbel's “Canon in D Major” for five minutes prior to the CAEP examination. To analyze the effect on the groups, the ear side and the ide–group interaction , a mixed analysis of variance (ANOVA) of repeated measures was performed. Box M test and Mauchly sphericity test were also performed. Results Test differences were considered statistically significant when the p-value was < 0.05 (5%). Thus, it was possible to observe that there was a statistically significant difference of the P2 component characterized by the decrease in the amplitude of response in the left ear in G2 when comparing the responses of CAEP with and without prior musical stimulation. Conclusion The result of the present study enabled us to conclude that there was a change in the response of CAEPs with musical stimulation.

scholarly journals Long latency auditory evokedpotentials in malnourished children

CoDAS ◽  
2013 ◽  
Vol 25 (5) ◽  
pp. 407-412 ◽  
Author(s):  
Renata Parente de Almeida ◽  
Carla Gentile Matas
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Impedance Measurement ◽  
Pure Tone Audiometry ◽  
Control Group ◽  
Study Group ◽  
Malnourished Children ◽  
Long Latency ◽  
Significant Difference ◽  
The Right

PURPOSE: To characterize the findings obtained in the long latency auditory evoked potentials in malnourished children, as well as to compare them to the results obtained for children at the same age who present typical development. METHODS: Sixty-five children aged between 7 and 12 years old, of both genders, were evaluated. The control group consisted of 34 children with normal development and the study group consisted of 31 children diagnosed with malnutrition. All children underwent conventional pure tone audiometry, acoustic impedance measurement, dichotic digit test and long latency auditory evoked potentials. RESULTS: The study group presented a statistically significant difference for latencies of the components P1, N1 and P300. The latencies of these components were higher than those of the control group. Concerning the types of alterations found in the study group, increased latency for P1 and P300 and the absence of response in N1 were predominant. The control group showed a statistically significant difference in the amplitude of P300 when compared to the right and left ears. CONCLUSION: Malnourished children present with changes in the long latency auditory evoked potentials, suggesting a deficit in central auditory pathways and alterations in the processing of acoustic information.

Cortical Auditory-Evoked Potentials in Response to Multitone Stimuli in Hearing-Impaired Adults

2016 ◽  
Vol 27 (05) ◽  
pp. 406-415 ◽  
Author(s):  
Fabrice Bardy ◽  
Jessica Sjahalam-King ◽  
Bram Van Dun ◽  
Harvey Dillon
Keyword(s):  
Hearing Loss ◽  
Evoked Potentials ◽  
Hearing Impairment ◽  
Auditory Evoked Potentials ◽  
Hearing Impaired ◽  
Detection Sensitivity ◽  
Auditory Stimuli ◽  
Significant Difference ◽  
Objective Detection ◽  
Cortical Auditory Evoked Potentials

Purpose: To determine if one-octave multitone (MT) stimuli increase the amplitude of cortical auditory-evoked potentials (CAEPs) in individuals with a hearing loss when compared to standard pure-tone (PT) stimuli and narrow-band noise (NBN). Research Design: CAEPs were obtained from 16 hearing-impaired adults in response to PT and MT auditory stimuli centered around 0.5, 1, 2, and 4 kHz and NBN centered around 1 and 2 kHz. Hearing impairment ranged from a mild to a moderate hearing loss in both ears. Auditory stimuli were monaurally delivered through insert earphones at 10 and 20 dB above threshold. The root mean square amplitude of the CAEP and the detectability of the responses using Hotelling’s T2 were calculated and analyzed. Results: CAEP amplitudes elicited with MT stimuli were on average 29% larger than PT stimuli for frequencies centered around 1, 2, and 4 kHz. No significant difference was found for responses to 0.5-kHz stimuli. Significantly higher objective detection scores were found for MT when compared to PT. For the 1- and 2-kHz stimuli, the CAEP amplitudes to NBN were not significantly different to those evoked by PT but a significant difference was found between MT stimuli and both NBN and PT. The mean detection sensitivity of MT for the four frequencies was 80% at 10 dB SL and 95% at 20 dB SL, and was comparable with detection sensitivities observed in normal-hearing participants. Conclusions: Using MT stimuli when testing CAEPs in adults with hearing impairment showed larger amplitudes and a higher objective detection sensitivity compared to using traditional PT stimuli for frequencies centered around 1, 2, and 4 kHz. These findings suggest that MT stimuli are a clinically useful tool to increase the efficiency of frequency-specific CAEP testing in adults with hearing impairment.

scholarly journals Human Midbrain Auditory Evoked Potentials Do Not Differ Between Bursts and Suppressions of Cortex Activity in Propofol Anesthesia: Case Report

2020 ◽  
Vol 5 (02) ◽  
Author(s):  
Anna O. Kantserova ◽  
Lyubov B. Oknina ◽  
Eugeny L. Masherov ◽  
Vitaly V. Podlepich ◽  
Maria I. Kamenetskaya ◽  
...  
Keyword(s):  
Evoked Potentials ◽  
General Anesthesia ◽  
Auditory Evoked Potentials ◽  
Obstructive Hydrocephalus ◽  
Pineal Region ◽  
Cerebral Aqueduct ◽  
Pineal Region Tumor ◽  
Transcallosal Approach ◽  
Total Length ◽  
Significant Difference

Propofol, the most widely administered anesthetic agent, is used for sedation and general anesthesia. During general anesthesia it can induce bursts and suppressions of cortex activity, which exact mechanism of generation has not been identified yet. The aim of study was to investigate the difference between midbrain auditory evoked potentials recorded during bursts and suppressions of cortex activity. These potentials were registered from the drainage-electrode implanted in the cerebral aqueduct of an adult patient with an obstructive hydrocephalus who had undergone pineal region tumor removal through anterior interhemispheric transcallosal approach. The cortex activity was divided into rare bursts of alpha activity (total length of 9 seconds) and prolonged suppressions (total length of 104 seconds). Midbrain auditory evoked potentials included long latency peaks with no statistically significant difference in their amplitudes and latencies between bursts and suppressions of cortex activity. The results suggest that human midbrain auditory evoked potentials do not differ between bursts and suppressions of cortex activity in propofol anesthesia. Therefore, for clear midbrain auditory evoked potentials cognitive but not the total electrical activity of the cortex should be suppressed.

scholarly journals Characteristics of short-patent auditory evoked potentials in children with cerebral palsy

2019 ◽  
Vol 9 (1) ◽  
pp. 52-60
Author(s):  
V. V. Dulnev ◽  
Т. A. Slyusar’
Keyword(s):  
Magnetic Resonance Imaging ◽  
Cerebral Palsy ◽  
Magnetic Resonance ◽  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Brainstem Auditory Evoked Potentials ◽  
Speech Impairment ◽  
Resonance Imaging ◽  
Significant Difference ◽  
Children With Cerebral Palsy

Background. In children with cerebral palsy, high risk of cognitive impairments connected with sensory disintegration – delayed visual and auditory perception.The objective – assessment of temporary and amplitude characteristics brainstem auditory evoked potentials of children with cerebral palsy.Materials and methods. Neurological examination, retrospective analysis of magnetic resonance imaging data of brain and 2-channel brainstem auditory evoked potentials registration with left- and right-ear stimulation and analysis was performed for 60 children aged 4–17 years, with mean age 11.80 ± 0.56 years.Results. There are no significant difference in brainstem auditory evoked potentials latencies of children’s with cerebral palsy age subgroups. A significantly increasing of III–V peak latencies of brainstem auditory evoked potentials and also I–III and I–V interpeak latencies was observed in children with cerebral palsy in comparison of control group. Latencies of different brainstem auditory evoked potentials peaks were significantly higher in children with uni- and bilateral form of cerebral palsy and speech impairment. Group with periventricular leucomalation (on magnetic resonance imaging) is characterized by significantly increased brainstem auditory evoked potentials latencies and normal interpeak intervals. These abnormalities may be linked to non-progressive impairment of brainstem acoustic afferentation.Conclusion. Impairment of brainstem auditory evoked potentials maturation and it’s difference in various cerebral palsy forms may be potentially clinical applicable for assessment of the children and early detection of sensory impairment.

scholarly journals Middle latency auditory evoked potential in child population

2016 ◽  
Vol 26 (3) ◽  
pp. 368 ◽  
Author(s):  
Anna Caroline Silva de Oliveira ◽  
Simone Fiuza Regaçone ◽  
Ana Claudia Figueiredo Frizzo
Keyword(s):  
Evoked Potentials ◽  
Auditory Evoked Potentials ◽  
Evoked Potential ◽  
Auditory Evoked Potential ◽  
Electrode Position ◽  
Potential System ◽  
Significant Difference ◽  
Left And Right ◽  
Middle Latency ◽  
The Right

Introduction: The middle-latency auditory evoked potential is used to evaluate any abnormality that might impair the central auditory pathways, which are situated between the brain stem and the primary auditory cortex. Objective: To analyse the middle-latency auditory evoked potentials in children. Methods: This is a descriptive and cross-sectional study. Pure-tone audiometry was performed, and if no change was detected, Biologic’s portable Evoked Potential System (EP) was used to measure auditory evoked potentials. The identification of the responses was performed using electrodes positioned at C3 and C4 (left and right hemispheres) in reference to ears A1 and A2 (left and right earlobe). These were ipsilaterally and contralaterally paired and landed at Fpz (forehead), in two steps, with alternating stimulation of the right and left ears. Results: In this study, there was 100% detectability of the Na, Pa, and Nb components and interamplitude Na–Pa. This study compared different electrode leads, and there was no significant difference between the different electrode positions studied for the right and left ears in the studied population. Conclusion: It was concluded that the examination of middle-latency evoked potential is steady and feasible for the studied age group regardless of electrode position.

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