Distinct Pathways Involved in Sound Recognition and Localization: A Human fMRI Study
| Autor: | Philippe Maeder, Jean-Philippe Thiran, Antoine Pittet, Stephanie Clarke, Anne Bellmann, Michela Adriani, Reto Meuli, Eleonora Fornari |
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| Rok vydání: | 2001 |
| Předmět: |
Adult
Male Sound localization Inferior colliculus Auditory Pathways Cognitive Neuroscience Middle temporal gyrus Precuneus Superior temporal gyrus Imaging Three-Dimensional Reference Values Image Processing Computer-Assisted medicine Humans Attention Sound Localization Brain Mapping Brain Inferior parietal lobule Middle Aged Medial geniculate body Magnetic Resonance Imaging Emotional lateralization medicine.anatomical_structure nervous system Neurology Mental Recall Auditory Perception Female Psychology Neuroscience Psychomotor Performance Psychoacoustics |
| Zdroj: | NeuroImage. 14:802-816 |
| ISSN: | 1053-8119 |
| Popis: | Evidence from psychophysical studies in normal and brain-damaged subjects suggests that auditory information relevant to recognition and localization are processed by distinct neuronal populations. We report here on anatomical segregation of these populations. Brain activation associated with performance in sound identification and localization was investigated in 18 normal subjects using fMRI. Three conditions were used: (i) comparison of spatial stimuli simulated with interaural time differences; (ii) identification of environmental sounds; and (iii) rest. Conditions (i) and (ii) required acknowledgment of predefined targets by pressing a button. After coregistering, images were normalized and smoothed. Activation patterns were analyzed using SPM99 for individual subjects and for the whole group. Sound recognition and localization activated, as compared to rest, inferior colliculus, medial geniculate body, Heschl gyrus, and parts of the temporal, parietal, and frontal convexity bilaterally. The activation pattern on the fronto-temporo-parietal convexity differed in the two conditions. Middle temporal gyrus and precuneus bilaterally and the posterior part of left inferior frontal gyrus were more activated by recognition than by localization. Lower part of inferior parietal lobule and posterior parts of middle and inferior frontal gyri were more activated, bilaterally, by localization than by recognition. Regions selectively activated by sound recognition, but not those selectively activated by localization, were significantly larger in women. Passive listening paradigm revealed segregated pathways on superior temporal gyrus and inferior parietal lobule. Thus, anatomically distinct networks are involved in sound recognition and sound localization. |
| Databáze: | OpenAIRE |
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