Neural Basis of Sensorimotor Plasticity in Speech Motor Adaptation
| Autor: | Shahabeddin Vahdat, David J. Ostry, Mohammad Darainy |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Auditory perception
Adult Male Cognitive Neuroscience Inferior frontal gyrus Sensory system Motor Activity Somatosensory system 050105 experimental psychology 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Neuroplasticity Neural Pathways Humans Learning Speech 0501 psychology and cognitive sciences skin and connective tissue diseases Brain Mapping Neuronal Plasticity 05 social sciences Brain Inferior parietal lobule Adaptation Physiological Magnetic Resonance Imaging Auditory Perception Female Original Article sense organs Primary motor cortex Psychology Neuroscience 030217 neurology & neurosurgery Vocal tract |
| Zdroj: | Cereb Cortex |
| ISSN: | 1460-2199 |
| Popis: | When we speak, we get correlated sensory feedback from speech sounds and from the muscles and soft tissues of the vocal tract. Here we dissociate the contributions of auditory and somatosensory feedback to identify brain networks that underlie the somatic contribution to speech motor learning. The technique uses a robotic device that selectively alters somatosensory inputs in combination with resting-state fMRI scans that reveal learning-related changes in functional connectivity. A partial correlation analysis is used to identify connectivity changes that are not explained by the time course of activity in any other learning-related areas. This analysis revealed changes related to behavioral improvements in movement and separately, to changes in auditory perception: Speech motor adaptation itself was associated with connectivity changes that were primarily in non-motor areas of brain, specifically, to a strengthening of connectivity between auditory and somatosensory cortex and between presupplementary motor area and the inferior parietal lobule. In contrast, connectively changes associated with alterations to auditory perception were restricted to speech motor areas, specifically, primary motor cortex and inferior frontal gyrus. Overall, our findings show that during adaptation, somatosensory inputs result in a broad range of changes in connectivity in areas associated with speech motor control and learning. |
| Databáze: | OpenAIRE |
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