Task-invariant networks interfere with and task-specific networks support memory formation: An fMRI meta-analysis

Area of Science:

• Neuroscience
• Cognitive Psychology

Background:

• Memory encoding is crucial for learning and experience.
• Understanding the neural basis of memory formation and forgetting is a key challenge in cognitive neuroscience.

Purpose of the Study:

• To investigate large-scale brain network dynamics during memory encoding.
• To identify distinct network patterns associated with successful versus impaired memory encoding across different task types.

Main Methods:

• Conducted a meta-analysis of 56 functional magnetic resonance imaging (fMRI) studies using the subsequent memory paradigm.
• Analyzed neural activity differences between remembered and forgotten trials.
• Utilized Yeo et al.'s 17-network parcellation for brain network analysis.

Main Results:

• Encoding-impairing effects were linked to task-invariant networks (default mode, frontoparietal, ventral attention), suggesting distraction or mind-wandering.
• Encoding-supporting effects were task-specific: verbal tasks engaged language networks, pictorial tasks activated visuo-perceptual systems.
• A dissociation was observed between task-invariant networks for forgetting and task-specific networks for remembering.

Conclusions:

• Memory failure may stem from consistent attentional lapses across contexts.
• Successful memory encoding requires precise, context-sensitive neural engagement.
• Brain network activity shifts between states supporting remembering and forgetting.