Auditory filter width affects response magnitude but not frequency specificity in auditory cortex

Herrmann, Björn; Henry, Molly J.; Scharinger, Mathias; Obleser, Jonas

doi:10.1016/j.heares.2013.07.005

Cited by 25 publications

(15 citation statements)

References 65 publications

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“…While our findings provide no support for the neural adaptation model, they also underscore the distinction between the attenuation of the N1 response to the second sound of a pair (or train) and the amplitude decreases associated with the degree of similarity between sounds that have been reported in studies using long sequences of alternating (Näätänen et al, ; Yagcioglu & Ungan, ) or randomly varying (Herrmann et al, ) tones. It would be of interest that future investigations address differences between the suppressive mechanisms at work in these two cases.…”

Section: Resultscontrasting

confidence: 79%

“…In studies using pure tones alternating in frequency (Näätänen et al, ; Yagcioglu & Ungan, ) or perceived spatial location (Butler, ; Näätänen et al, ), the N1 has been shown to decrease in amplitude with decreasing differences between the two alternating tones. Herrmann et al recorded N1 responses to pure tones varying randomly in frequency and found that the amplitudes were lower the closer the tone frequency was to the center of the variation range (Herrmann, Henry, Scharinger, & Obleser, ; Herrmann, Schlichting, & Obleser, ). Whereas such results have been interpreted as evidencing stimulus‐specific adaptation, they are not necessarily in conflict with ours.…”

Section: Discussionmentioning

confidence: 99%

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N1 response attenuation and the mismatch negativity (MMN) to within‐ and across‐category phonetic contrasts

2017

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According to the neural adaptation model of the mismatch negativity (MMN), the sensitivity of this event-related response to both acoustic and categorical information in speech sounds can be accounted for by assuming that (a) the degree of overlapping between neural representations of two sounds depends on both the acoustic difference between them and whether or not they belong to distinct phonetic categories, and (b) a release from stimulus-specific adaptation causes an enhanced N1 obligatory response to infrequent deviant stimuli. On the basis of this view, we tested in Experiment 1 whether the N1 response to the second sound of a pair (S ) would be more attenuated in pairs of identical vowels compared with pairs of different vowels, and in pairs of exemplars of the same vowel category compared with pairs of exemplars of different categories. The psychoacoustic distance between S and S was the same for all within-category and across-category pairs. While N1 amplitudes decreased markedly from S to S , responses to S were quite similar across pair types, indicating that the attenuation effect in such conditions is not stimulus specific. In Experiment 2, a pronounced MMN was elicited by a deviant vowel sound in an across-category oddball sequence, but not when the exact same deviant vowel was presented in a within-category oddball sequence. This adds evidence that MMN reflects categorical phonetic processing. Taken together, the results suggest that different neural processes underlie the attenuation of the N1 response to S and the MMN to vowels.

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Section: Resultscontrasting

confidence: 79%

Section: Discussionmentioning

confidence: 99%

N1 response attenuation and the mismatch negativity (MMN) to within‐ and across‐category phonetic contrasts

2017

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“…Entrained neural responses to AM and FM are dissociable in humans6061 and non-human animals62. Previous work from our laboratory moreover indicates that, while the time course of cortical adaptation to repeated sounds contracts with age49, the pattern of cortical frequency-specific adaptation does not differ between younger and older adults48. Lastly, comparisons of topographies for entrained responses to FM versus evoked responses to tone-sequence stimulation suggest that the two response types originate from non-redundant cortical generators.…”

Section: Discussionmentioning

confidence: 61%

“…3b). Thus, although N1 amplitudes were actually larger for older compared to younger adults4849, P2 amplitudes were reduced in older adults and correlated with the magnitude of 2.8 Hz entrainment. This held also for separate analyses in younger ( ρ =0.54, P =0.02 (Spearman rank-order correlations, n =20)) and in older adults ( ρ =0.43, P =0.06 (Spearman rank-order correlations, n =20)), ruling out the possibility that the overall correlation reflects age effects on both variables.…”

Section: Resultsmentioning

confidence: 81%

Aging affects the balance of neural entrainment and top-down neural modulation in the listening brain

et al. 2017

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Healthy aging is accompanied by listening difficulties, including decreased speech comprehension, that stem from an ill-understood combination of sensory and cognitive changes. Here, we use electroencephalography to demonstrate that auditory neural oscillations of older adults entrain less firmly and less flexibly to speech-paced (∼3 Hz) rhythms than younger adults’ during attentive listening. These neural entrainment effects are distinct in magnitude and origin from the neural response to sound per se. Non-entrained parieto-occipital alpha (8–12 Hz) oscillations are enhanced in young adults, but suppressed in older participants, during attentive listening. Entrained neural phase and task-induced alpha amplitude exert opposite, complementary effects on listening performance: higher alpha amplitude is associated with reduced entrainment-driven behavioural performance modulation. Thus, alpha amplitude as a task-driven, neuro-modulatory signal can counteract the behavioural corollaries of neural entrainment. Balancing these two neural strategies may present new paths for intervention in age-related listening difficulties.

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“…Previous work in animals showed enhanced firing rates along the ascending auditory pathway following hearing loss and accompanying ageing (Popelár et al ., ; Syka et al ., ; Hughes et al ., ; Manzoor et al ., ). In particular, auditory cortex neural activity appears to be enhanced in animals with hearing loss (Stolzberg et al ., ) as well as in aged animals and humans (Laffont et al ., ; Hughes et al ., ; Herrmann et al ., , ; Bidelman et al ., ). Assuming that synaptic neuronal activity at the soma and dendrites (input to a neuron or neuronal population) strongly contributes to the LFP and spiking reflects the output of a neuron or neuronal population (Bullock, ; Logothetis et al ., ; Logothetis & Wandell, ; Buzsáki et al ., ), the current data show that within a single midbrain structure (inferior colliculus) neuronal response magnitudes become relatively enhanced from synaptic to spiking activity in aged animals.…”

Section: Discussionmentioning

confidence: 97%

Ageing affects dual encoding of periodicity and envelope shape in rat inferior colliculus neurons

Herrmann

Parthasarathy

Bartlett

2016

Eur J of Neuroscience

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Extracting temporal periodicities and envelope shapes of sounds is important for listening within complex auditory scenes but declines behaviorally with age. Here we recorded local field potentials (LFPs) and spikes to investigate how aging affects the neural representations of different modulation rates and envelope shapes in the inferior colliculus of rats. We specifically aimed to explore the input-output (LFP-spike) response transformations of inferior colliculus neurons. Our results show that envelope shapes up to 256-Hz modulation rates are represented in the neural synchronization phase lags in younger and older animals. Critically, aging was associated with (1) an enhanced gain in onset response magnitude from LFPs to spikes; (2) an enhanced gain in neural synchronization strength from LFPs to spikes for a low modulation rate (45 Hz); (3) a decrease in LFP synchronization strength for higher modulation rates (128 and 256 Hz); and (4) changes in neural synchronization strength to different envelope shapes. The current age-related changes are discussed in the context of an altered excitation-inhibition balance accompanying aging.

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Auditory filter width affects response magnitude but not frequency specificity in auditory cortex

Cited by 25 publications

References 65 publications

N1 response attenuation and the mismatch negativity (MMN) to within‐ and across‐category phonetic contrasts

N1 response attenuation and the mismatch negativity (MMN) to within‐ and across‐category phonetic contrasts

Aging affects the balance of neural entrainment and top-down neural modulation in the listening brain

Ageing affects dual encoding of periodicity and envelope shape in rat inferior colliculus neurons

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