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Instructional load induces functional connectivity changes linked to task automaticity and mnemonic preference

Baumann, Alexander W. ; Schäfer, Theo A.J. ; Ruge, Hannes

NeuroImage (Orlando, Fla.), 2023-08, Vol.277, p.120262-120262, Article 120262 [Periódico revisado por pares]

United States: Elsevier Inc

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  • Título:
    Instructional load induces functional connectivity changes linked to task automaticity and mnemonic preference
  • Autor: Baumann, Alexander W. ; Schäfer, Theo A.J. ; Ruge, Hannes
  • Assuntos: Automaticity ; Automation ; Behavior ; Brain ; Brain - physiology ; Brain Mapping ; Cognitive ability ; Episodic memory ; Functional connectivity ; Functional magnetic resonance imaging ; Humans ; Instruction-based learning ; Learning ; Load ; Long term memory ; Magnetic Resonance Imaging ; Memory ; Memory, Short-Term - physiology ; Neural networks ; Neural Pathways - physiology ; Neuroimaging ; Prefrontal cortex ; Prefrontal Cortex - diagnostic imaging ; Prefrontal Cortex - physiology ; Short term memory ; Working memory
  • É parte de: NeuroImage (Orlando, Fla.), 2023-08, Vol.277, p.120262-120262, Article 120262
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: •Instructional load induces a shift in functional integration of lateral PFC regions.•Coupling to ‘task-positive’ areas was stronger after low-load instructions.•Default mode network was increasingly connected after high-load instructions.•Coupling profile implies difference in task automaticity and memory system access.•Ventrolateral PFC couplings are associated with distinct instructional features. Learning new rules rapidly and effectively via instructions is ubiquitous in our daily lives, yet the underlying cognitive and neural mechanisms are complex. Using functional magnetic resonance imaging we examined the effects of different instructional load conditions (4 vs. 10 stimulus-response rules) on functional couplings during rule implementation (always 4 rules). Focusing on connections of lateral prefrontal cortex (LPFC) regions, the results emphasized an opposing trend of load-related changes in LPFC-seeded couplings. On the one hand, during the low-load condition LPFC regions were more strongly coupled with cortical areas mostly assigned to networks such as the fronto-parietal network and the dorsal attention network. On the other hand, during the high-load condition, the same LPFC areas were more strongly coupled with default mode network areas. These results suggest differences in automated processing evoked by features of the instruction and an enduring response conflict mediated by lingering episodic long-term memory traces when instructional load exceeds working memory capacity limits. The ventrolateral prefrontal cortex (VLPFC) exhibited hemispherical differences regarding whole-brain coupling and practice-related dynamics. Left VLPFC connections showed a persistent load-related effect independent of practice and were associated with ‘objective’ learning success in overt behavioral performance, consistent with a role in mediating the enduring influence of the initially instructed task rules. Right VLPFC's connections, in turn, were more susceptible to practice-related effects, suggesting a more flexible role possibly related to ongoing rule updating processes throughout rule implementation.
  • Editor: United States: Elsevier Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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