Insights on the neuromagnetic representation of temporal asymmetry in human auditory cortex
| Autor: | Anita Siebert, Selma Supek, André Rupp, Alejandro Tabas, Emili Balaguer-Ballester, Daniel Pressnitzer |
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| Přispěvatelé: | University of Zurich, Tabas, Alejandro |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
magnetoencephalography
0301 basic medicine auditory modelling lcsh:Medicine Social Sciences 10050 Institute of Pharmacology and Toxicology Nervous System N100m Mathematical and Statistical Techniques 0302 clinical medicine Hearing Medicine and Health Sciences Psychology Right Hemisphere lcsh:Science Pitch Perception psychophysical studies media_common Brain Mapping Multidisciplinary medicine.diagnostic_test Nerves Brain Magnetoencephalography PRIRODNE ZNANOSTI. Fizika temporal asymmetry processing Auditory Perception Evoked Potentials Auditory auditory evoked fields (AEF) damped and ramped tones Sensory Perception Anatomy Psychoacoustics Research Article Adult Imaging Techniques media_common.quotation_subject Neuroimaging 610 Medicine & health 1100 General Agricultural and Biological Sciences Stimulus (physiology) Research and Analysis Methods Auditory cortex Models Biological Lateralization of brain function Auditory Nerves Young Adult 03 medical and health sciences Salience (neuroscience) 1300 General Biochemistry Genetics and Molecular Biology Perception Sine Waves medicine Humans Computer Simulation Left Hemisphere Auditory Cortex 1000 Multidisciplinary lcsh:R Cognitive Psychology Biology and Life Sciences Neurophysiology NATURAL SCIENCES. Physics Electrophysiology 030104 developmental biology Acoustic Stimulation Cognitive Science 570 Life sciences biology lcsh:Q Mathematical Functions Cerebral Hemispheres Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | PLoS One Volume 11 Issue 4 PLoS ONE PLoS ONE, Vol 11, Iss 4, p e0153947 (2016) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0153947 |
| Popis: | Communication sounds are typically asymmetric in time and human listeners are highly sensitive to this short-term temporal asymmetry. Nevertheless, causal neurophysiological correlates of auditory perceptual asymmetry remain largely elusive to our current analyses\ud and models. Auditory modelling and animal electrophysiological recordings suggest that perceptual asymmetry results from the presence of multiple time scales of temporal integration, central to the auditory periphery. To test this hypothesis we recorded auditory evoked fields (AEF) elicited by asymmetric sounds in humans. We found a strong correlation between perceived tonal salience of ramped and damped sinusoids and the AEFs, as quantified by the amplitude of the N100m dynamics. The N100m amplitude increased with stimulus\ud half-life time, showing a maximum difference between the ramped and damped stimulus for a modulation half-life time of 4 ms which is greatly reduced at 0.5 ms and 32 ms. This behaviour of the N100m closely parallels psychophysical data in a manner that: i) longer\ud half-life times are associated with a stronger tonal percept, and ii) perceptual differences between damped and ramped are maximal at 4 ms half-life time. Interestingly, differences in evoked fields were significantly stronger in the right hemisphere, indicating some degree of hemispheric specialisation. Furthermore, the N100m magnitude was successfully\ud explained by a pitch perception model using multiple scales of temporal integration of auditory\ud nerve activity patterns. This striking correlation between AEFs, perception, and model predictions suggests that the physiological mechanisms involved in the processing of pitch evoked by temporal asymmetric sounds are reflected in the N100m. |
| Databáze: | OpenAIRE |
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