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The prefrontal cortex and its relation to behavior.

J M Fuster1

  • 1Department of Psychiatry, School of Medicine, University of California, Los Angeles 90024.

Progress in Brain Research
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

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The prefrontal cortex organizes behavior over time by integrating sensory information with motor actions. Its dorsolateral areas use short-term memory and preparatory set functions to manage these temporal relationships.

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Behavioral Neuroscience

Background:

  • The prefrontal cortex is crucial for temporal organization of behavior.
  • It integrates motor actions with recent sensory information through cross-temporal sensory-motor contingencies.
  • This function relies on short-term memory (STM) and preparatory set in dorsolateral areas.

Purpose of the Study:

  • To investigate the role of dorsolateral prefrontal cortex in temporal organization of behavior.
  • To identify neuronal mechanisms underlying cross-temporal sensory-motor contingencies.
  • To differentiate cellular functions related to short-term memory and motor preparation.

Main Methods:

  • Monkeys performed delay tasks requiring responses to cues presented earlier.

Related Experiment Videos

  • Electrophysiological recordings were used to monitor neuronal activity in the dorsolateral prefrontal cortex during delay periods.
  • Analysis focused on sustained cellular activation patterns related to memory and motor preparation.

    • Main Results:

    • Sustained neuronal activation was observed in dorsolateral prefrontal cortex during the delay between cue and response.
    • Two distinct cell categories were identified: those involved in short-term memory (activation diminished over delay) and those in motor preparation (activation increased before response).
    • Motor-preparation-related cells were predominantly found in frontal cortex, suggesting a specialized role.

    Conclusions:

    • The prefrontal cortex temporally integrates behavior via interactions between memory and motor-set cells.
    • These interactions, along with connections to posterior cortical areas, support complex temporal sequencing.
    • The findings highlight the dorsolateral prefrontal cortex's unique contribution to cognitive functions requiring temporal organization.