NDLI: Right parietal cortex and calculation processing: intraoperative functional mapping of multiplication and addition in patients affected by a brain tumor.

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Right parietal cortex and calculation processing: intraoperative functional mapping of multiplication and addition in patients affected by a brain tumor.

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Right parietal cortex and calculation processing: intraoperative functional mapping of multiplication and addition in patients affected by a brain tumor.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Della Puppa, Alessandro De Pellegrin, Serena D'avella, Elena Gioffrè, Giorgio Munari, Marina Saladini, Marina Salillas, Elena Scienza, Renato Semenza, Carlo
Description	Author Affiliation: Della Puppa A ( Departments of Neurosurgery.)
Abstract	OBJECT: The role of parietal areas in number processing is well known. The significance of intraoperative functional mapping of these areas has been only partially explored, however, and only a few discordant data are available in the surgical literature with regard to the right parietal lobe. The purpose of this study was to evaluate the clinical impact of simple calculation in cortical electrostimulation of right-handed patients affected by a right parietal brain tumor. METHODS: Calculation mapping in awake surgery was performed in 3 right-handed patients affected by high-grade gliomas located in the right parietal lobe. Preoperatively, none of the patients presented with calculation deficits. In all 3 cases, after sensorimotor and language mapping, cortical and intraparietal sulcus areas involved in single-digit multiplication and addition calculations were mapped using bipolar electrostimulation. RESULTS: In all patients, different sites of the right parietal cortex, mainly in the inferior lobule, were detected as being specifically related to calculation (multiplication or addition). In 2 patients the intraparietal sulcus was functionally specific for multiplication. No functional sites for language were detected. All sites functional for calculation were spared during tumor resection, which was complete in all cases without postoperative neurological deficits. CONCLUSIONS: These findings provide intraoperative data in support of an anatomofunctional organization for multiplication and addition within the right parietal area. Furthermore, the study shows the potential clinical relevance of intraoperative mapping of calculation in patients undergoing surgery in the right parietal area. Further and larger studies are needed to confirm these data and assess whether mapped areas are effectively essential for function.
File Format	HTM / HTML
ISSN	00223085
e-ISSN	19330693
Journal	Journal of Neurosurgery
Issue Number	5
Volume Number	119
Language	English
Publisher	American Association of Neurological Surgeons
Publisher Date	2013-11-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Neurosurgery Brain Mapping Brain Neoplasms Surgery Electric Stimulation Glioma Monitoring, Intraoperative Parietal Lobe Instrumentation Feasibility Studies Pathology Physiopathology
Content Type	Text
Resource Type	Case study Article
Subject	Neurology (clinical) Surgery

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