Temporal processing ability is related to ear-asymmetry for detecting time cues in sound: A mismatch negativity (MMN) study
| Autor: | Brayden Finch, Ulrich Schall, Timothy W. Budd, Juanita Todd, Ellen Smith |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male medicine.medical_specialty Time Factors Adolescent Cognitive Neuroscience media_common.quotation_subject Mismatch negativity Contingent Negative Variation Experimental and Cognitive Psychology Context (language use) Audiology Monaural Brain mapping Functional Laterality Statistics Nonparametric Young Adult Behavioral Neuroscience Perception Reaction Time otorhinolaryngologic diseases medicine Humans Aged media_common Analysis of Variance Brain Mapping Communication business.industry Ear Electroencephalography Cognition Middle Aged Time perception Noise Sound Acoustic Stimulation Evoked Potentials Auditory Female Cues business Psychology |
| Zdroj: | Neuropsychologia. 49:69-82 |
| ISSN: | 0028-3932 |
| DOI: | 10.1016/j.neuropsychologia.2010.10.029 |
| Popis: | Temporal and spectral sound information is processed asymmetrically in the brain with the left-hemisphere showing an advantage for processing the former and the right-hemisphere for the latter. Using monaural sound presentation we demonstrate a context and ability dependent ear-asymmetry in brain measures of temporal change detection. Our measure of temporal processing ability was a gap-detection task quantifying the smallest silent gap in a sound that participants could reliably detect. Our brain measure was the size of the mismatch-negativity (MMN) auditory event-related potential elicited to infrequently presented gap sounds. The MMN indexes discrimination ability and is automatically generated when the brain detects a change in a repeating pattern of sound. MMN was elicited in unattended sequences of infrequent gap-sounds presented among regular no-gap sounds. In Study 1, participants with low gap-detection thresholds (good ability) produced a significantly larger MMN to gap sounds when sequences were presented monaurally to the right-ear than to the left-ear. In Study 2, we not only replicated a right-ear-advantage for MMN in silence in good temporal processors, but also showed that this is reversed to a significant left-ear-advantage for MMN when the same sounds are presented against a background of constant low-level noise. In both studies, poor discriminators showed no ear-advantage, and in Study 2, exhibited no differential sensitivity of the ears to noise. We conclude that these data reveal a context and ability-dependent asymmetry in processing temporal information in non-speech sounds. |
| Databáze: | OpenAIRE |
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