Early dissociation of numbers and letters in the human brain
| Autor: | Doug Davidson, Manuel Carreiras, Nicola Molinaro, Sara Aurtenetxe |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Adult
Dissociation (neuropsychology) genetic structures Cognitive Neuroscience Experimental and Cognitive Psychology Numbers 050105 experimental psychology Event related fields 03 medical and health sciences Perceptual system 0302 clinical medicine medicine Humans 0501 psychology and cognitive sciences Letters Brain Mapping medicine.diagnostic_test 05 social sciences Functional specialization Brain Magnetoencephalography Human brain Neuropsychology and Physiological Psychology medicine.anatomical_structure Reading Time course Psychology Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación Universidad de Cantabria (UC) instname Addi: Archivo Digital para la Docencia y la Investigación Universidad del País Vasco |
| Popis: | Published online 7 May 2020 Numbers and letters are culturally created symbols which are learned through repeated training. This experience leads to a functional specialization of the perceptual system of our brain. Recent evidence suggests a neural dissociation between these two symbols. While previous literature has shown that letters elicit a left lateralized neural response, new studies suggest that numbers elicit preferentially a bilateral or right lateralized response. However, the time course of the neural patterns that characterize this dissociation is still underspecified. In the present study, we investigated with magnetoencephalography (MEG) the spatio-temporal dynamics of the neural response generated by numbers, letters and perceptually matched false fonts presented visually. Twenty-five healthy adults were recorded while participants performed a dot detection task. By including two experiments, we were able to study the effects of single characters as well as those of strings of characters. The signal analysis was focused on the event related fields (ERF) of the MEG signal in the sensors and in the source space. The main results of our study showed an early ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|