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Neurons in monkey prefrontal cortex that track past or predict future performance.

R P Hasegawa1, A M Blitz, N L Geller

  • 1Laboratory of Sensorimotor Research, National Eye Institute, Bethesda, MD 20892-4435, USA. rh@lsr.nei.nih.gov

Science (New York, N.Y.)
|December 2, 2000
PubMed
Summary

Frontal cortex neuron activity correlates with past and future performance, not just current actions. This suggests roles in arousal and motivation, influencing behavior over longer timescales.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Primate Behavior

Background:

  • The frontal cortex is crucial for long-term behavioral control.
  • Most research focuses on instantaneous neuronal responses, neglecting longer temporal dynamics.

Purpose of the Study:

  • To investigate the relationship between frontal cortex activity and behavior over extended periods.
  • To explore how prefrontal neuronal activity relates to fluctuating performance in a challenging task.

Main Methods:

  • Rhesus monkeys were trained on a difficult oculomotor task.
  • Prefrontal neuronal activity was recorded during task performance and inter-trial intervals.
  • Neuronal activity was correlated with behavioral performance over time.

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Main Results:

  • Monkey performance fluctuated throughout the day.
  • Prefrontal neuronal activity correlated probabilistically with past and predicted future performance.
  • Neuronal activity reflected longer-term performance trends more than immediate task relevance.

Conclusions:

  • Frontal cortex activity may regulate arousal or motivation, influencing behavior over longer timescales.
  • This activity is not solely based on millisecond-by-millisecond control.
  • Slow synaptic processes involving second messengers might underlie these sustained effects.