BOLD correlates of edge detection in human auditory cortex
| Autor: | Francesco Di Salle, Christoph Lehmann, Klaus Scheffler, Dominik R. Bach, Marcus Herdener, Erich Seifritz, Fabrizio Esposito |
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| Přispěvatelé: | Cognitive Neuroscience, RS: FPN CN I |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Auditory perception
Adult Male medicine.medical_specialty Echoic memory Auditory Pathways Cerebral Cognitive Neuroscience Planum temporale Adult Attention physiology Auditory Cortex physiology Auditory Pathways physiology Auditory Perception physiology Auditory Threshold physiology Brain Mapping Dominance physiology Evoked Potentials physiology Female Humans Image Processing Computer-Assisted Loudness Perception physiology Magnetic Resonance Imaging Male Middle Aged Oxygen blood Image Processing Loudness Perception Audiology Auditory cortex Computer-Assisted Image Processing Computer-Assisted medicine otorhinolaryngologic diseases Auditory system Humans Attention Dominance Cerebral Evoked Potentials Dominance Temporal cortex Auditory Cortex Brain Mapping medicine.diagnostic_test Auditory Threshold Superior temporal sulcus Middle Aged Magnetic Resonance Imaging Oxygen medicine.anatomical_structure Neurology physiology Auditory Perception Female Functional magnetic resonance imaging Psychology Neuroscience |
| Zdroj: | Neuroimage, 36(1), 194-201. Elsevier Science NeuroImage |
| ISSN: | 1053-8119 |
| DOI: | 10.1016/j.neuroimage.2007.01.050 |
| Popis: | Edges are important cues defining coherent auditory objects. As a model of auditory edges, sound on- and offset are particularly suitable to study their neural underpinnings because they contrast a specific physical input against no physical input. Change from silence to sound, that is onset, has extensively been studied and elicits transient neural responses bilaterally in auditory cortex. However, neural activity associated with sound onset is not only related to edge detection but also to novel afferent inputs. Edges at the change from sound to silence, that is offset, are not confounded by novel physical input and thus allow to examine neural activity associated with sound edges per se. In the first experiment, we used silent acquisition functional magnetic resonance imaging and found that the offset of pulsed sound activates planum temporale, superior temporal sulcus and planum polare of the right hemisphere. In the planum temporale and the superior temporal sulcus, offset response amplitudes were related to the pulse repetition rate of the preceding stimulation. In the second experiment, we found that these offset-responsive regions were also activated by single sound pulses, onset of sound pulse sequences and single sound pulse omissions within sound pulse sequences. However, they were not active during sustained sound presentation. Thus, our data show that circumscribed areas in right temporal cortex are specifically involved in identifying auditory edges. This operation is crucial for translating acoustic signal time series into coherent auditory objects. |
| Databáze: | OpenAIRE |
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