BOLD (fMRI) Activation on Multiple Demand (MD) Regions and Default Mode Network (DMN) at the Beginning and During Various Extended Tasks
The Psychonomic Society Annual Meeting, New York, Amerika Birleşik Devletleri, 21 - 24 Kasım 2024, ss.253-254, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Basıldığı Şehir: New York
- Basıldığı Ülke: Amerika Birleşik Devletleri
- Sayfa Sayıları: ss.253-254
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Extended tasks include minor tasks executed as a unitary construct. We investigated the BOLD activation in different task conditions. Our study showed that MD regions and some DMN regions on difficult tasks showed deactivation on start of tasks and increased their activation during tasks. However, the same regions on easy tasks showed an increased activation at the start of the tasks and a deactivation during the tasks. We conducted two distinct experiments employing extended tasks. The first was a tactile determination task in which participants identified the larger shape on plexiglass tablets. The second experiment utilized an auditory 3 versus 1 n-back working memory task with letters. Both experiments had an easy condition and a difficult condition. Results showed that extended tasks are not unitary constructs; they encompass varying levels of complexity and engage distinct psychological and neural processes. Notably, MD regions exhibited a specific activation pattern delineated by task difficulty, with certain DMN regions demonstrating similar activation pattern. These findings shed light on the dynamic interplay between brain networks during extended task performance and task demands.