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Memory related motor planning activity in posterior parietal cortex of macaque

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Summary

Unit recording studies in the lateral bank of the intraparietal cortex (area LIP) have demonstrated a response property not previously reported in posterior cortex. Studies were performed in the Rhesus monkey during tasks which required saccadic eye movements to remembered target locations in the dark. Neurons were found which remained active during the time period for which the monkey had to withhold eye movements while remembering desired target locations. The activity of the cells was tuned for eye movements of specific direction and amplitude, and it was not necessary for a visual stimulus to fall within the response field. The responses appeared to represent a memory-related motor-planning signal encoding motor error. The relation of the activity to the behavior of the animal suggests that the response represents the intent to make eye movements of specific direction and amplitude.

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Correspondence to R. A. Andersen.

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Gnadt, J.W., Andersen, R.A. Memory related motor planning activity in posterior parietal cortex of macaque. Exp Brain Res 70, 216–220 (1988). https://doi.org/10.1007/BF00271862

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Key words

  • Saccade
  • Parietal cortex
  • Memory
  • Monkey
  • Motor-planning
  • Oculomotor
  • Motor error
  • Intention