Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults
Studies of compensatory plasticity in early deaf (ED) individuals have mainly focused on unisensory processing, and on spatial rather than temporal coding. However, precise discrimination of the temporal relationship between stimuli is imperative for successful perception of and interaction with the...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-09-01
|
| Series: | Frontiers in Neuroscience |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fnins.2020.544472/full |
| _version_ | 1831737868025856000 |
|---|---|
| author | Alexandra N. Scurry Kudzai Chifamba Fang Jiang |
| author_facet | Alexandra N. Scurry Kudzai Chifamba Fang Jiang |
| author_sort | Alexandra N. Scurry |
| collection | DOAJ |
| description | Studies of compensatory plasticity in early deaf (ED) individuals have mainly focused on unisensory processing, and on spatial rather than temporal coding. However, precise discrimination of the temporal relationship between stimuli is imperative for successful perception of and interaction with the complex, multimodal environment. Although the properties of cross-modal temporal processing have been extensively studied in neurotypical populations, remarkably little is known about how the loss of one sense impacts the integrity of temporal interactions among the remaining senses. To understand how auditory deprivation affects multisensory temporal interactions, ED and age-matched normal hearing (NH) controls performed a visual-tactile temporal order judgment task in which visual and tactile stimuli were separated by varying stimulus onset asynchronies (SOAs) and subjects had to discern the leading stimulus. Participants performed the task while EEG data were recorded. Group averaged event-related potential waveforms were compared between groups in occipital and fronto-central electrodes. Despite similar temporal order sensitivities and performance accuracy, ED had larger visual P100 amplitudes for all SOA levels and larger tactile N140 amplitudes for the shortest asynchronous (± 30 ms) and synchronous SOA levels. The enhanced signal strength reflected in these components from ED adults are discussed in terms of compensatory recruitment of cortical areas for visual-tactile processing. In addition, ED adults had similar tactile P200 amplitudes as NH but longer P200 latencies suggesting reduced efficiency in later processing of tactile information. Overall, these results suggest that greater responses by ED for early processing of visual and tactile signals are likely critical for maintained performance in visual-tactile temporal order discrimination. |
| first_indexed | 2024-12-21T13:12:44Z |
| format | Article |
| id | doaj.art-eab242e65d31419fa9b2bcd205306dd6 |
| institution | Directory Open Access Journal |
| issn | 1662-453X |
| language | English |
| last_indexed | 2024-12-21T13:12:44Z |
| publishDate | 2020-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Neuroscience |
| spelling | doaj.art-eab242e65d31419fa9b2bcd205306dd62022-12-21T19:02:51ZengFrontiers Media S.A.Frontiers in Neuroscience1662-453X2020-09-011410.3389/fnins.2020.544472544472Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf AdultsAlexandra N. ScurryKudzai ChifambaFang JiangStudies of compensatory plasticity in early deaf (ED) individuals have mainly focused on unisensory processing, and on spatial rather than temporal coding. However, precise discrimination of the temporal relationship between stimuli is imperative for successful perception of and interaction with the complex, multimodal environment. Although the properties of cross-modal temporal processing have been extensively studied in neurotypical populations, remarkably little is known about how the loss of one sense impacts the integrity of temporal interactions among the remaining senses. To understand how auditory deprivation affects multisensory temporal interactions, ED and age-matched normal hearing (NH) controls performed a visual-tactile temporal order judgment task in which visual and tactile stimuli were separated by varying stimulus onset asynchronies (SOAs) and subjects had to discern the leading stimulus. Participants performed the task while EEG data were recorded. Group averaged event-related potential waveforms were compared between groups in occipital and fronto-central electrodes. Despite similar temporal order sensitivities and performance accuracy, ED had larger visual P100 amplitudes for all SOA levels and larger tactile N140 amplitudes for the shortest asynchronous (± 30 ms) and synchronous SOA levels. The enhanced signal strength reflected in these components from ED adults are discussed in terms of compensatory recruitment of cortical areas for visual-tactile processing. In addition, ED adults had similar tactile P200 amplitudes as NH but longer P200 latencies suggesting reduced efficiency in later processing of tactile information. Overall, these results suggest that greater responses by ED for early processing of visual and tactile signals are likely critical for maintained performance in visual-tactile temporal order discrimination.https://www.frontiersin.org/article/10.3389/fnins.2020.544472/fulldeafnesstemporal processingcross-modal plasticityevent-related potentialsmultisensory perceptiontemporal order perception |
| spellingShingle | Alexandra N. Scurry Kudzai Chifamba Fang Jiang Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults Frontiers in Neuroscience deafness temporal processing cross-modal plasticity event-related potentials multisensory perception temporal order perception |
| title | Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults |
| title_full | Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults |
| title_fullStr | Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults |
| title_full_unstemmed | Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults |
| title_short | Electrophysiological Dynamics of Visual-Tactile Temporal Order Perception in Early Deaf Adults |
| title_sort | electrophysiological dynamics of visual tactile temporal order perception in early deaf adults |
| topic | deafness temporal processing cross-modal plasticity event-related potentials multisensory perception temporal order perception |
| url | https://www.frontiersin.org/article/10.3389/fnins.2020.544472/full |
| work_keys_str_mv | AT alexandranscurry electrophysiologicaldynamicsofvisualtactiletemporalorderperceptioninearlydeafadults AT kudzaichifamba electrophysiologicaldynamicsofvisualtactiletemporalorderperceptioninearlydeafadults AT fangjiang electrophysiologicaldynamicsofvisualtactiletemporalorderperceptioninearlydeafadults |