Episodic events are flexibly encoded in both integrated and separated neural representations

Area of Science:

• Cognitive Neuroscience
• Neuroscience of Memory

Background:

• Recalling everyday events requires balancing shared similarities and unique details.
• Neural mechanisms underlying this balance in memory encoding are not fully understood.

Purpose of the Study:

• To investigate the neural processes that balance integrative encoding and distinct trace formation during memory.
• To understand how the brain supports both relational inference and detailed recollection.

Main Methods:

• Electroencephalography (EEG) was used to record brain activity.
• Participants viewed naturalistic movie scenes with overlapping episodic events.
• Time-resolved representational similarity analysis examined neural pattern similarities and dissimilarities.

Main Results:

• Neural patterns showed both similarities and dissimilarities as events unfolded.
• Similarities in neural patterns predicted successful cross-episode information inference (integrative encoding).
• Dissimilarities predicted accurate memory for individual events (distinct trace formation).

Conclusions:

• The brain flexibly encodes both integrated and separated neural representations.
• This dual encoding supports different mnemonic goals, balancing inference and recollection.
• Findings clarify neural underpinnings of memory flexibility.