The main purpose of the present study was to learn how mathematical abilities are located and develop in the brain with respect to language. Mathematical abilities were assessed in six right-handed patients affected by aphasia following a lesion to their non-dominant hemisphere (crossed aphasia) and in two left-handed aphasics with a right-sided lesion. Acalculia, although in different degrees, was found in all cases. The type of acalculia depended on the type of aphasia, following patterns that have been previously observed in the most common aphasias resulting from left hemisphere lesions. No sign of right hemisphere or spatial acalculia (acalculia in left lateralised right-handed subjects) was detected. These results suggest that, as a rule, language and calculation share the same hemisphere. A primitive computational mechanism capable of recursion may be the precursor of both functions.

译文

:本研究的主要目的是学习关于语言的数学能力如何在大脑中定位和发展。评估了六名右撇子患者在非优势性半球病变(交叉性失​​语症)后患失语症的数学能力,以及两名左撇子右手病变的数学能力。在所有情况下均发现失语症,尽管程度不同。失语症的类型取决于失语症的类型,其遵循先前在左半球病变导致的最常见失语症中观察到的模式。未检测到右半球或空间失聪的迹象(左外侧右手受试者的眼球积水)。这些结果表明,通常,语言和计算共享相同的半球。能够递归的原始计算机制可能是这两种功能的先驱。

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