A recent brain imaging study reveals that when people engage in cognitively demanding tasks, like following a coherent story, their brain activity becomes both more detailed (informative) and efficiently structured (compressible). This contrasts with less structured or simpler tasks, such as listening to scrambled stories or resting. Over time, the brain optimizes these patterns, showing that it adapts dynamically to the complexity of the task at hand. Higher-order networks in the brain, responsible for decision-making and memory, display more significant changes in these properties compared to basic sensory processing regions. This adaptability highlights how the brain fine-tunes its operations to balance cognitive flexibility and efficiency, shedding light on fundamental mechanisms of human cognition.
A study published in PNAS reveals that during higher-level cognitive tasks, such as listening to a coherent story, brain activity becomes both more informative and compressible. Informativeness refers to the detail and relevance of brain patterns to the task, while compressibility measures how efficiently these patterns can be represented. In contrast, lower-level tasks, like listening to scrambled stories or resting, result in less organized brain activity. This dynamic adaptation highlights how the brain fine-tunes its function to meet varying cognitive demands. The research advances understanding of brain efficiency and cognitive flexibility, with potential implications for understanding mental conditions and cognitive health.
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