Vượt qua Đặc trưng Bán cầu: Các Khu vực Não Liên quan đến Sự Tương Phối Bán cầu Giữa Ngôn ngữ và Toán học ở Bán cầu Trái
Tóm tắt
Ngôn ngữ và phép toán đều được phân phối chủ yếu ở bán cầu trái trong hầu hết những người trưởng thành thuận tay phải. Tuy nhiên, sự phân bố tương tự này có phản ánh một sự hạn chế tổng thể về tổ chức não bộ, như một “thống trị” chung của bán cầu trái đối với tất cả các hoạt động ngôn ngữ và biểu tượng không? Nó có liên quan đến sự phân bố của các khu vực cụ thể trong não? Hay chỉ đơn thuần là ngẫu nhiên? Để làm sáng tỏ vấn đề này, chúng tôi đã thực hiện một “phân tích phân bố đồng thời” trên 209 chủ thể khỏe mạnh: Chúng tôi đã điều tra xem sự biến đổi bình thường trong mức độ bất đối xứng ở bán cầu trái trong các khu vực liên quan đến việc nghe và đọc câu có phản ánh sự bất đối xứng của các khu vực liên quan đến toán học hay không. Trong mạng lưới ngôn ngữ, một phân tích khu vực quan tâm đã tiết lộ các mô hình phân bố một phần không liên quan đến mô hình “thống trị” tổng thể. Chỉ có hai trong số các khu vực này thể hiện sự phân bố trong quá trình nghe và đọc câu mà tương quan mạnh mẽ với sự phân bố của hai khu vực hoạt động trong quá trình tính toán. Cụ thể, hồ sơ của sự bất đối xứng trong sulcus thái dương trên sau khi xử lý câu có tương quan với sự bất đối xứng của hoạt động kích thích do tính toán trong sulcus lưng giữa, và một sự phân bố tương tự đã liên kết gyrus trán giữa với thùy chẩm sau trên. Dựa trên kết quả hình ảnh não gần đây cho thấy sự xuất hiện muộn của sự bất đối xứng bán cầu cho phép toán biểu tượng trong suốt thời thơ ấu, chúng tôi suy đoán rằng những sự phân bố này có thể cấu thành các dấu vết phát triển về cách mà sự tiếp thu các biểu tượng ngôn ngữ ảnh hưởng đến tổ chức não bộ của mạng lưới toán học.
Từ khóa
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