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了解语言在大脑中如何定位和发展数学能力。在六名非优势半球病变 (交叉失语症) 后受失语症影响的右手患者和两名右侧病变的左手失语症患者中评估了数学能力。尽管在不同程度上,但在所有情况下都发现了Acalculia。Aalculia的类型取决于失语症的类型,遵循先前在左半球病变引起的最常见失语症中观察到的模式。未检测到右半球或空间无alculia (左侧右手受试者中的无alculia) 的迹象。这些结果表明,通常,语言和计算具有相同的半球。能够递归的原始计算机制可能是这两个功能的前身。

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