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Related Concept Videos

Working Memory01:24

Working Memory

Working memory refers to a combination of components, including short-term memory and attention, that allow an individual to hold information temporarily as we perform cognitive tasks. It is an essential cognitive function that enables the execution of complex tasks such as problem-solving, comprehension, and reasoning. Unlike short-term memory, which simply involves the storage of information for a brief period, working memory involves the active manipulation and processing of this information.
Role of Cerebellum and Prefrontal Cortex in Memory01:14

Role of Cerebellum and Prefrontal Cortex in Memory

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 cerebellum's...

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Reward-dependent modulation of working memory in lateral prefrontal cortex.

Steven W Kennerley1, Jonathan D Wallis

  • 1Department of Psychology and Helen Wills Neuroscience Institute, University of California at Berkeley, California 94720-3190, USA.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|March 13, 2009
PubMed
Summary

Expected rewards enhance executive functions like spatial working memory by modulating prefrontal cortex (PFC) activity. Ventrolateral PFC neurons show stronger reward-related modulation, improving cognitive resource allocation and performance.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology

Background:

  • Lateral prefrontal cortex (PFC) is implicated in executive control and goal-directed behavior.
  • The precise mechanisms by which goals, such as expected rewards, influence executive processes remain unclear.

Purpose of the Study:

  • To investigate how expected rewards modulate spatial working memory.
  • To compare the functional properties of neurons in ventrolateral PFC and dorsolateral PFC regarding reward modulation.

Main Methods:

  • Recorded single-neuron activity in ventrolateral and dorsolateral PFC during a spatial working memory task with varying reward expectancies.
  • Balanced presentation of spatial and reward information to assess independent and conjoint encoding.
  • Analyzed neuronal encoding of spatial and reward information and its temporal dynamics.

Main Results:

  • Ventrolateral PFC neurons encoded spatial and reward information earlier, more strongly, and with greater sustained activity than dorsolateral PFC neurons.
  • Spatial selectivity within ventrolateral PFC was more pronounced on the inferior convexity compared to the principal sulcus.
  • Increased spatial selectivity due to reward anticipation correlated with improved behavioral performance, while decreased selectivity correlated with performance decline.

Conclusions:

  • Ventrolateral PFC may serve as a critical node for integrating expected reward information to modulate working memory representations.
  • The findings support a role for ventrolateral PFC in attentional control, demonstrating how reward value influences cognitive resource allocation.