The relationship between visual word and face processing lateralization in the fusiform gyri: A cross-sectional study
| Autor: | Jodie Davies-Thompson, Yashar Tashakkor, Samantha Johnston, Raika Pancaroglu, Jason J. S. Barton |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male computer.software_genre Functional Laterality 050105 experimental psychology Lateralization of brain function Young Adult 03 medical and health sciences 0302 clinical medicine Face perception Voxel Humans 0501 psychology and cognitive sciences Visual Word Visual word form area Molecular Biology Brain Mapping General Neuroscience 05 social sciences Fusiform face area Magnetic Resonance Imaging Temporal Lobe Cross-Sectional Studies Pattern Recognition Visual Reading Face (geometry) Female Neurology (clinical) Psychology Facial Recognition computer Photic Stimulation 030217 neurology & neurosurgery Word (group theory) Developmental Biology Cognitive psychology |
| Zdroj: | Brain Research. 1644:88-97 |
| ISSN: | 0006-8993 |
| DOI: | 10.1016/j.brainres.2016.05.009 |
| Popis: | Visual words and faces activate similar networks but with complementary hemispheric asymmetries, faces being lateralized to the right and words to the left. A recent theory proposes that this reflects developmental competition between visual word and face processing. We investigated whether this results in an inverse correlation between the degree of lateralization of visual word and face activation in the fusiform gyri. 26 literate right-handed healthy adults underwent functional MRI with face and word localizers. We derived lateralization indices for cluster size and peak responses for word and face activity in left and right fusiform gyri, and correlated these across subjects. A secondary analysis examined all face- and word-selective voxels in the inferior occipitotemporal cortex. No negative correlations were found. There were positive correlations for the peak MR response between word and face activity within the left hemisphere, and between word activity in the left visual word form area and face activity in the right fusiform face area. The face lateralization index was positively rather than negatively correlated with the word index. In summary, we do not find a complementary relationship between visual word and face lateralization across subjects. The significance of the positive correlations is unclear: some may reflect the influences of general factors such as attention, but others may point to other factors that influence lateralization of function. |
| Databáze: | OpenAIRE |
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