Neuroscience
Finke K, Bublak P, & Zihl J. Visual spatial and visual pattern working memory: Neuropsychological evidence for a differential role of left and right dorsal visual brain. Neuropsychologia. 2005 Aug 16; [Epub ahead of print].
Department of Psychology, Neuropsychology, Ludwig-Maximilian University of Munich, Leopoldstrasse 13, D-80802 Munchen, Germany; Max Planck Institute of Psychiatry, Munich, Germany.
According to neurophysiological, neuroimaging, and behavioural evidence, visual working memory (WM) can be separated into a "what" and a "where" component, reflecting the duality of visual processing. Whereas a wealth of empirical data suggests a right-sided fronto-parietal network critical for the maintenance of spatial information, the cortical structures underlying maintenance of object information have remained controversial. Although visual object processing depends on ventral, inferior temporal areas, recent neuroimaging results suggest that maintenance of visual object information involves a left-sided or bilateral fronto-parietal network. The aim of the present study is to further clarify the role of the left and right parietal lobes for pattern and spatial visual WM. Seven patients with left-sided, seven with right-sided parietal brain injury, and two age-matched healthy control groups performed a delayed-matching-to-sample task using either pattern (shape) or spatial (location) information or both. In addition, eight patients with left-sided injury sparing parietal areas were tested to further examine the specific role of the left parietal cortex in pattern WM. Left parietal injury resulted in pattern WM impairment, only, while right parietal injury was associated with pattern and spatial WM deficits. Non-parietal injury was not associated with comparable deficits. These results suggest that visual spatial WM depends critically on right parietal areas; in contrast, pattern WM depends on both, left and right parietal areas.
PMID: 16111725 [PubMed - as supplied by publisher]
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Anthony H. Risser | neuroscience | neuropsychology | brain
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Neuroscience
Abstract of the Day: Neuropsychology of 'What' and 'Where' Streams in Visual Working Memory
Finke K, Bublak P, & Zihl J. Visual spatial and visual pattern working memory: Neuropsychological evidence for a differential role of left and right dorsal visual brain. Neuropsychologia. 2005 Aug 16; [Epub ahead of print].
Department of Psychology, Neuropsychology, Ludwig-Maximilian University of Munich, Leopoldstrasse 13, D-80802 Munchen, Germany; Max Planck Institute of Psychiatry, Munich, Germany.
According to neurophysiological, neuroimaging, and behavioural evidence, visual working memory (WM) can be separated into a "what" and a "where" component, reflecting the duality of visual processing. Whereas a wealth of empirical data suggests a right-sided fronto-parietal network critical for the maintenance of spatial information, the cortical structures underlying maintenance of object information have remained controversial. Although visual object processing depends on ventral, inferior temporal areas, recent neuroimaging results suggest that maintenance of visual object information involves a left-sided or bilateral fronto-parietal network. The aim of the present study is to further clarify the role of the left and right parietal lobes for pattern and spatial visual WM. Seven patients with left-sided, seven with right-sided parietal brain injury, and two age-matched healthy control groups performed a delayed-matching-to-sample task using either pattern (shape) or spatial (location) information or both. In addition, eight patients with left-sided injury sparing parietal areas were tested to further examine the specific role of the left parietal cortex in pattern WM. Left parietal injury resulted in pattern WM impairment, only, while right parietal injury was associated with pattern and spatial WM deficits. Non-parietal injury was not associated with comparable deficits. These results suggest that visual spatial WM depends critically on right parietal areas; in contrast, pattern WM depends on both, left and right parietal areas.
PMID: 16111725 [PubMed - as supplied by publisher]
-
Anthony H. Risser | neuroscience | neuropsychology | brain
- The Trouble With Bodies
You think you're yourself, but there are other persons in you. In the funhouse mirror-room you can't see yourself go on forever, because no matter how you stand, your head gets in the way. -- John Barth, Lost in the FunhouseIndividuals with body...
- Neuropsychology Abstract Of The Day: Fmri Protocol For Intrinsic Alertness
Revealing the Functional Neuroanatomy of Intrinsic Alertness Using fMRI: Methodological Peculiarities PLoS One. 2011; 6(9): e25453 Clemens B, Zvyagintsev M, Sack A, Heinecke A, Willmes K, Sturm W Abstract Clinical observations and neuroimaging data revealed...
- Neuropsychology Abstract Of The Day: Temporal Encoding
Bueti D, Bahrami B, Walsh V, & Rees G. Encoding of temporal probabilities in the human brain. Journal of Neuroscience. 2010 Mar 24, 30(12), 4343-4352. Anticipating the timing of future events is a necessary precursor to preparing actions and allocating...
- Neuropsychology Abstract Of The Day: Fmri Study Of Digit Symbol Task
Usui N, Haji T, Maruyama M, Katsuyama N, Uchida S, Hozawa A, Omori K, Tsuji I, Kawashima R, & Taira M. (2009). Cortical areas related to performance of WAIS Digit Symbol Test: a functional imaging study. Neurosci Lett. Jul 21. Many neuropsychological...
- Neuropsychology Abstract Of The Day: Mild Cognitive Impairment (mci)
Karas G, Sluimer J, Goekoop R, van der Flier W, Rombouts S, Vrenken H, Scheltens P, Fox N, & Barkhof F. Amnestic Mild Cognitive Impairment: Structural MR Imaging Findings Predictive of Conversion to Alzheimer Disease. American Journal of Neuroradiology....