Compression as a neural mechanism of mnemonic chunking in prefrontal cortex.

Neural compression in the dorsolateral prefrontal cortex enhances memory retention by systematically biasing representations toward chunk centers, reducing dimensionality by 25%.

• Why it matters: Understanding how the brain forms chunks is crucial for revealing the neural basis of working memory and cognitive efficiency, yet the underlying mechanisms remain unclear.
• What they did: Researchers recorded neural activity in macaque monkeys performing a visuospatial working memory task, analyzing how chunking influenced neural representations and behavior across 20 sessions.
• The result: Chunking biased neural representations toward common centers and compressed population activity, leading to improved memory performance despite lossy information encoding, thus revealing a neural compression mechanism.