The time-course of activation in the dorsal and ventral visual streams during landmark cueing and perceptual discrimination tasks

Autor: Anthony Lambert, Adrienne Wootton
Rok vydání: 2017
Předmět:
Adult
Male
genetic structures
Cognitive Neuroscience
media_common.quotation_subject
Experimental and Cognitive Psychology
Superior parietal lobule
Neuropsychological Tests
Stimulus (physiology)
behavioral disciplines and activities
050105 experimental psychology
Young Adult
03 medical and health sciences
Behavioral Neuroscience
Discrimination
Psychological
0302 clinical medicine
Inferior temporal gyrus
Perception
Humans
Visual Pathways
0501 psychology and cognitive sciences
Vision for perception and vision for action
media_common
Fusiform gyrus
Landmark
05 social sciences
Brain
Electroencephalography
Perceptual discrimination
Pattern Recognition
Visual
Evoked Potentials
Visual
Female
Cues
Psychology
Neuroscience
psychological phenomena and processes
030217 neurology & neurosurgery
Cognitive psychology
Zdroj: Neuropsychologia. 103:1-11
ISSN: 0028-3932
DOI: 10.1016/j.neuropsychologia.2017.07.002
Popis: Different patterns of high density EEG activity were elicited by the same peripheral stimuli, in the context of Landmark Cueing and Perceptual Discrimination tasks. The C1 component of the visual event-related potential (ERP) at parietal - occipital electrode sites was larger in the Landmark Cueing task, and source localisation suggested greater activation in the superior parietal lobule (SPL) in this task, compared to the Perceptual Discrimination task, indicating stronger early recruitment of the dorsal visual stream. In the Perceptual Discrimination task, source localisation suggested widespread activation of the inferior temporal gyrus (ITG) and fusiform gyrus (FFG), structures associated with the ventral visual stream, during the early phase of the P1 ERP component. Moreover, during a later epoch (171-270ms after stimulus onset) increased temporal-occipital negativity, and stronger recruitment of ITG and FFG were observed in the Perceptual Discrimination task. These findings illuminate the contrasting functions of the dorsal and ventral visual streams, to support rapid shifts of attention in response to contextual landmarks, and conscious discrimination, respectively.
Databáze: OpenAIRE
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