Procedia computer science

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The present data extend this observation to a semantic decision task that does not require word retrieval. The cerebellum may play a general role in facilitating complex neural computations (Keele and Ivry, 1990; Leiner et al. Several patients were reported to show cognitive deficits in association with cerebellar damage (Bracke-Tolkmitt et al.

A major activation during the semantic decision task occurred near the splenium of the corpus callosum. Much of this region probably coincides with retrosplenial cortex (Vogt, 1976), which has connections with hippocampus, parahippocampus (Mufson and Pandya, 1984; Suzuki and Amaral, 1994), and anterolaterodorsal thalamus (Sripanidkulchai and Wyss, 1986).

Retrosplenial procedia computer science may therefore be related to memory-encoding processes that accompanied performance of the semantic decision task. Although identification of memory systems was not an intended goal, processing at a semantic level is known to enhance storage of episodic procedia computer science compared with processing at a perceptual level (Craik and Lockhart, 1972).

Thus, the episodic memory encoding system was likely activated during the semantic task relative procedia computer science the tone task. The supramarginal gyrus was activated bilaterally by the tone decision task relative to the semantic decision task and, therefore, was not considered to be a language area.

Lesions in or near this structure cause speech output disturbances characterized by phonemic paraphasias in repetition (Geschwind, 1965; Damasio and Damasio, 1980) and other phonological deficits (Caplan et al. One hypothesis that would reconcile these various findings is that the supramarginal gyrus may be involved in short-term storage of auditory information (Warrington et al.

The tone decision task, which involved monitoring arbitrary sequences of up to seven tones, probably placed more demand on short-term auditory memory resources than did the semantic task, which involved familiar word stimuli. Relative lateralization of supramarginal gyrus activation to the right hemisphere is consistent with data showing right hemisphere dominance for short-term storage of nonlinguistic auditory information (Zatorre and Samson, 1991; Zatorre et al.

This work was supported by a grant from the McDonnell-Pew Program in Cognitive Neuroscience, National Institute of Neurological Diseases and Stroke Grant RO1 NS33576, and National Institute of Mental Health Grant PO1 MH51358. Estkowski for discussion and technical assistance. Correspondence should be addressed to Dr. Lactulose Solution (Lactulose Solution)- Multum, Department of Neurology, Medical College of Wisconsin, 9200 West Wisconsin Avenue, Milwaukee, WI 53226.

JNeurosci Online ISSN: 1529-2401The ideas and opinions expressed in JNeurosci do ftwdaddy necessarily reflect those of SfN or the JNeurosci Editorial Board. Skip to main content Procedia computer science menu HOME CONTENTEarly Release Featured Current Issue Issue Archive Collections ALERTS FOR AUTHORSPreparing a Manuscript Submission Guidelines Fees Journal Club eLetters Submit EDITORIAL BOARD ABOUTOverview Advertise For the Media Rights and Permissions Privacy Policy Feedback SUBSCRIBE User menu Log in My Cart Search Search for this keyword Advanced search Log in My Cart Search for this keyword Advanced Procedia computer science. Language areasAreas that procedia computer science activated more strongly by the semantic procedia computer science task than by the tone procedia computer science were defined as language areas and were found almost exclusively in the left hemisphere or in the right cerebellum (Fig.

DISCUSSIONThis FMRI study sought to identify candidate language processing areas in the intact human brain and to distinguish these from nonlanguage areas. Other activated areasFunctional activation of the right cerebellum during word generation tasks is a consistent finding in PET studies that include the cerebellum (Petersen et al.

FootnotesThis work was supported by a grant from the McDonnell-Pew Program in Cognitive Neuroscience, National Institute of Neurological Diseases and Stroke Grant RO1 NS33576, and National Institute of Mental Health Grant PO1 MH51358. OpenUrlCrossRefPubMedAlexander MP, Hiltbrunner B, Fischer RS (1989) Distributed anatomy of transcortical sensory aphasia.

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OpenUrlFREE Full TextKeele SW, Ivry R (1990) Does the cerebellum provide a common computation for diverse tasks.

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