Delayed discrimination of spatial frequency for gratings of different orientation: behavioral and fMRI evidence for low-level perceptual memory stores in early visual cortex.

Experimental Brain Research
Oliver BaumannM W Greenlee

Abstract

The concept of perceptual memory refers to the neural and cognitive processes underlying the storage of specific stimulus features such as spatial frequency, orientation, shape, contrast, and color. Psychophysical studies of perceptual memory indicate that observers can retain visual information about the spatial frequency of Gabor patterns independent of the orientation with which they are presented. Compared to discrimination of gratings with the same orientation, reaction times to orthogonally oriented gratings, however, increase suggesting additional processing. Using event-related fMRI we examined the pattern of neural activation evoked when subjects discriminated the spatial frequency of Gabors presented with the same or orthogonal orientation. Blood-oxygen level dependent BOLD fMRI revealed significantly elevated bilateral activity in visual areas (V1, V2) when the gratings to be compared had an orthogonal orientation, compared to when they had the same orientation. These findings suggest that a change in an irrelevant stimulus dimension requires additional processing in primary and secondary visual areas. The finding that the task-irrelevant stimulus property (orientation) had no significant effect on the prefrontal and...Continue Reading

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Citations

Jan 30, 2014·PloS One·Maria Olkkonen, Sarah R Allred
Jun 21, 2013·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Yue XingDenis Schluppeck
Nov 26, 2009·Scandinavian Journal of Psychology·Svein Magnussen
Jan 21, 2014·NeuroImage·Agneish DuttaDavid Soto
Sep 25, 2014·Annual Review of Psychology·Takeo Watanabe, Yuka Sasaki
Aug 13, 2013·PloS One·Thomas GeyerSteffen Gais
Feb 6, 2004·Current Biology : CB·Edwin M RobertsonDaniel Z Press
Feb 4, 2010·Developmental Science·Anna FranklinAlex White
Mar 19, 2019·Frontiers in Aging Neuroscience·Claudine HabakOury Monchi
Apr 30, 2020·Attention, Perception & Psychophysics·Thomy Nilsson
Apr 23, 2021·Scientific Reports·Bianca R BaltaretuJ Douglas Crawford

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