Do neurons in the motor cortex encode movement direction? An alternative hypothesis

F. A. Mussa-Ivaldi*

*Corresponding author for this work

Research output: Contribution to journalArticle

137 Scopus citations

Abstract

Previous investigations by Georgopoulos et al. of cell activities in the primate motor cortex during the execution of voluntary arm movements have shown that these cells are characterized by tuning properties related to the direction of hand trajectories. Here, it is demonstrated that these findings do not necessarily imply that cortical cells encode spatial features of hand movements and an alternative hypothesis is considered according to which cortical cells encode muscle state variables. It is shown that this hypothesis would lead both to the single-cell activities and to the population behaviors observed by Georgopoulos et al.

Original languageEnglish (US)
Pages (from-to)106-111
Number of pages6
JournalNeuroscience Letters
Volume91
Issue number1
DOIs
StatePublished - Aug 15 1988

Keywords

  • Activation vector
  • Distribution
  • Fourier series
  • Jacobian matrix
  • Motor cortex
  • Multi-joint movement
  • Muscle moment arm
  • Preferred direction

ASJC Scopus subject areas

  • Neuroscience(all)

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