Right parietal cortex and calculation processing. Intra-operative functional mapping of multiplication and addition.
Della Puppa, Alessandro ; De Pellegrin, S. ; d´avella, E. ; Gioffre, G. ; Munari, M. ; Saladini, M. ; Salillas, E. ; Semenza, C.
Resumen: 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.
Idioma: Inglés
DOI: 10.3171/2013.6.JNS122445
Año: 2013
Publicado en: Journal of neurosurgery 119, 5 (2013), 1107 - 1111
ISSN: 0022-3085
Factor impacto JCR: 3.227 (2013)
Categ. JCR: SURGERY rank: 21 / 199 = 0.106 (2013) - Q1 - T1
Categ. JCR: CLINICAL NEUROLOGY rank: 50 / 191 = 0.262 (2013) - Q2 - T1
Tipo y forma: Artículo (PrePrint)
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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.
Idioma: Inglés
DOI: 10.3171/2013.6.JNS122445
Año: 2013
Publicado en: Journal of neurosurgery 119, 5 (2013), 1107 - 1111
ISSN: 0022-3085
Factor impacto JCR: 3.227 (2013)
Categ. JCR: SURGERY rank: 21 / 199 = 0.106 (2013) - Q1 - T1
Categ. JCR: CLINICAL NEUROLOGY rank: 50 / 191 = 0.262 (2013) - Q2 - T1
Tipo y forma: Artículo (PrePrint)
Debe reconocer adecuadamente la autoría, proporcionar un enlace a la licencia e indicar si se han realizado cambios. Puede hacerlo de cualquier manera razonable, pero no de una manera que sugiera que tiene el apoyo del licenciador o lo recibe por el uso que hace. No puede utilizar el material para una finalidad comercial. Si remezcla, transforma o crea a partir del material, no puede difundir el material modificado.Exportado de SIDERAL (2025-10-17-14:29:02)
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