OBJECT: In an attempt to gain a better understanding of the cerebral functions represented in the angular gyrus and to spare them during surgery, the authors studied @entity1 with @entity1313 located close to the angular gyrus and mapped cortical sites by using electrostimulation. METHODS: Before undergoing @entity5 removal, six right-handed @entity1 (five with left and one with right hemisphere @entity5 ) were studied using cortical mapping with the aid of calculating, writing, finger-recognition, and color-naming tasks in addition to standard reading and object-naming tasks (for a total of 36 brain mapping studies). Strict conditions of functional site validation were applied to include only those cortical sites that produced repetitive interferences in the function tested. Preoperatively, four of the @entity1 exhibited discrete symptoms related to @entity1052 while performing very specific tasks, whereas the other two @entity1 presented with no symptoms of the syndrome. No @entity1 had significant language or @entity51 . Distinct or shared cortical sites producing interferences in calculating, finger recognition, and writing were repeatedly found in the angular gyrus. Object- or color-naming sites and reading-interference sites were also found in or close to the angular gyrus; although frequently demonstrated, these latter results were variable and unpredictable in the group of @entity1 studied. Finger @entity1054 and @entity1056 sites were also found elsewhere, such as in the supramarginal gyrus or close to the intraparietal sulcus. Mechanisms involved in @entity1056 , @entity1055 , or finger @entity1054 (either complete interferences or hesitations) during stimulation were various, from an @entity2026 -like form (for instance, the @entity1 did not understand the numbers or words given for calculating or writing tasks) to an apparently pure interference in the function tested ( @entity1 understood the numbers, but were unable to perform a simple addition). CONCLUSIONS: Symptoms of @entity1052 can be found during direct brain mapping in the angular gyrus region. In this series of @entity1 , sites producing interferences in writing, calculating, and finger recognition were demonstrated in the angular gyrus, which may or may not have been associated with object-naming, color-naming, or reading sites.

Writing, calculating, and finger recognition in the region of the angular gyrus: a cortical stimulation study of XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity1052 :: ('MESH:D005862', 'Disease') :: ['Gerstmann syndrome'] @entity1313 :: ('MESH:D001932', 'Disease') :: ['brain tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumor', 'tumors'] @entity1056 :: ('MESH:D060705', 'Disease') :: ['acalculia'] @entity51 :: ('MESH:D009461', 'Disease') :: ['apraxic deficits'] @entity2026 :: ('MESH:D001037', 'Disease') :: ['aphasia'] @entity1054 :: ('MESH:D000377', 'Disease') :: ['agnosia'] @entity1055 :: ('MESH:D000381', 'Disease') :: ['agraphia']
@entity1052 :: (MESH:D005862,Disease) :: ['Gerstmann syndrome']
