Role for cells in the presupplementary motor area in updating motor plans

Keisetsu Shima, Hajime Mushiake, Naohiro Saito, Jun Tanji

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194 Citations (Scopus)


Two motor areas are known to exist in the medial frontal lobe of the cerebral cortex of primates, the supplementary motor area (SMA) and the presupplementary motor area (pre-SMA). We report here on an aspect of cellular activity that characterizes the pre-SMA. Monkeys were trained to perform three different movements sequentially in a temporal order. The correct order was planned on the basis of visual information before its execution. A group of pre-SMA cells (n = 64, 25%) were active during a process when monkeys were required to discard a current motor plan and develop a plan appropriate for the next orderly movements. Such activity was not common in the SMA and not found in the primary motor cortex. Our data suggest a role of pre-SMA cells in updating motor plans for subsequent temporally ordered movements.

Original languageEnglish
Pages (from-to)8694-8698
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number16
Publication statusPublished - 1996 Aug 6

ASJC Scopus subject areas

  • General

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