Nội dung được dịch bởi AI, chỉ mang tính chất tham khảo
Hoạt động trì hoãn trái bên, nhưng không phải phân bổ alpha, chỉ số hóa việc ưu tiên thông tin để lưu trữ bộ nhớ làm việc
Tóm tắt
Bộ nhớ làm việc vốn dĩ có giới hạn, điều này khiến việc lựa chọn và duy trì chỉ thông tin liên quan đến nhiệm vụ trở nên quan trọng, cùng với việc bảo vệ thông tin này khỏi sự phân tâm. Nghiên cứu trước đây đã gợi ý rằng hoạt động trì hoãn trái bên (CDA) và dao động alpha trái phải là những ứng cử viên thần kinh cho quá trình ưu tiên như vậy. Trong khi hầu hết công trình này tập trung vào sự phân tâm trong quá trình ghi nhớ, chúng tôi đã xem xét tác động của sự phân tâm bên ngoài diễn ra trong thời gian duy trì bộ nhớ. Những người tham gia đã ghi nhớ hướng của ba vật thể nằm lệch bên. Sau một khoảng thời gian duy trì không có phân tâm ban đầu, các yếu tố phân tâm xuất hiện ở cùng vị trí với các mục tiêu hoặc ở bán cầu bên đối diện. Sự phân tâm này được theo sau bởi một khoảng thời gian không có phân tâm khác. Kết quả của chúng tôi cho thấy biên độ CDA mạnh hơn trong khoảng thời gian trước khi có sự phân tâm so với khoảng thời gian sau sự phân tâm (tức là, biên độ CDA mạnh hơn phản ứng với các mục tiêu so với các yếu tố phân tâm). Sự giảm biên độ này phản ứng với các yếu tố phân tâm rõ rệt hơn ở những người tham gia có độ chính xác bộ nhớ cao hơn, chỉ ra việc ưu tiên và duy trì thông tin có liên quan thay vì thông tin không liên quan. Ngược lại, sự phân bổ alpha không thay đổi từ khoảng thời gian trước khi phân tâm so với khoảng thời gian sau phân tâm, và chúng tôi không tìm thấy mối tương quan nào giữa phân bổ alpha và độ chính xác bộ nhớ. Những kết quả này cho thấy rằng phân bổ alpha không đóng vai trò trực tiếp trong việc duy trì chọn lọc thông tin có liên quan đến nhiệm vụ hoặc ức chế các yếu tố phân tâm. Thay vào đó, phân bổ alpha phản ánh sự phân bổ sự chú ý không gian hiện tại tới thông tin nổi bật nhất mà không phân biệt liên quan đến nhiệm vụ. Ngược lại, CDA chỉ ra sự phân bổ linh hoạt của tài nguyên bộ nhớ làm việc tùy thuộc vào tính liên quan của nhiệm vụ.
Từ khóa
#bộ nhớ làm việc #hoạt động trì hoãn trái bên #phân bổ alpha #thông tin liên quan #phân tâmTài liệu tham khảo
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