Selective involvement of superior frontal cortex during working memory for shapes.

Journal of Neurophysiology
Lydia T S YeeSusan M Courtney

Abstract

A spatial/nonspatial functional dissociation between the dorsal and ventral visual pathways is well established and has formed the basis of domain-specific theories of prefrontal cortex (PFC). Inconsistencies in the literature regarding prefrontal organization, however, have led to questions regarding whether the nature of the dissociations observed in PFC during working memory are equivalent to those observed in the visual pathways for perception. In particular, the dissociation between dorsal and ventral PFC during working memory for locations versus object identities has been clearly present in some studies but not in others, seemingly in part due to the type of objects used. The current study compared functional MRI activation during delayed-recognition tasks for shape or color, two object features considered to be processed by the ventral pathway for perceptual recognition. Activation for the shape-delayed recognition task was greater than that for the color task in the lateral occipital cortex, in agreement with studies of visual perception. Greater memory-delay activity was also observed, however, in the parietal and superior frontal cortices for the shape than for the color task. Activity in superior frontal cortex was ...Continue Reading

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Citations

Aug 18, 2012·Neural Plasticity·Milan Fedurco
Jan 5, 2012·Psychonomic Bulletin & Review·Jun YinMowei Shen
Aug 13, 2011·Human Brain Mapping·Carter WendelkenSilvia A Bunge
May 27, 2015·Nature Reviews. Endocrinology·Roberta D BrintonEnrique Cadenas
Oct 17, 2014·Journal of Cognitive Neuroscience·Joaquín M Fuster, Steven L Bressler

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