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The somatosensory cortex in the parietal lobes is crucial for interpreting sensory data such as touch, temperature, and proprioception. The somatosensory cortex, situated in the parietal lobes, plays a vital role in interpreting sensory information like touch, temperature, and proprioception—awareness of body position. This specialized brain region features an organized structure wherein neurons at the top primarily process sensations originating from the lower body. In contrast, those at...
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The cerebellum, while traditionally associated with motor control, also plays a crucial role in memory, particularly in procedural memory, which involves learning motor tasks that become automatic through repetition. For example, studies have shown that when the cerebellum is damaged, individuals or animals lose the ability to learn conditioned motor responses, such as the conditioned eye-blink response in classical conditioning experiments with rabbits. This study demonstrates the...
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The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
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Stimulus representation in human frontal cortex supports flexible control in working memory.

Zhujun Shao1,2, Mengya Zhang1, Qing Yu1

  • 1Institute of Neuroscience, State Key Laboratory of Brain Cognition and Brain-inspired Intelligence Technology, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China.

Elife
|April 24, 2025
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Summary

Frontal cortex stimulus representation supports flexible working memory (WM) control, while visual cortex representation aids precise maintenance. This neural coding scheme adapts to changing environments.

Keywords:
cognitive flexibilityfMRIfrontal cortexhumanneurosciencerecurrent neural networkvisual cortexworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Working memory (WM) involves temporary storage and manipulation of visual information.
  • Neural representation during WM is distributed across visual and frontal cortices.
  • The precise roles of frontal and visual cortices in WM stimulus representation remain debated.

Purpose of the Study:

  • To investigate the hypothesis that frontal cortex stimulus representation facilitates flexible control demands in WM.
  • To differentiate the roles of frontal and visual cortices in WM maintenance versus control.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to measure brain activity.
  • Participants performed flexible switching between simple WM maintenance and complex rule-based categorization.
  • Multi-module recurrent neural networks were used for computational modeling.

Main Results:

  • Frontal cortex showed enhanced stimulus representation tracking WM control demands.
  • Visual cortex showed enhanced stimulus representation tracking precise WM maintenance demands.
  • Differential frontal representation traded off with category representation based on control demands.

Conclusions:

  • Findings reconcile the debate on WM neural representation.
  • Empirical and computational evidence supports flexible frontal stimulus representation for WM control.
  • This neural coding scheme accommodates dynamic environmental demands.