A comparison of preparation-related neuronal activity changes in the prefrontal, premotor, primary motor and posterior parietal areas of the monkey cortex: preliminary results.
Single-unit activity of prefrontal (PF), premotor (PM), primary motor (MI) and posterior parietal (PP) cortical areas was analysed from 3 monkeys trained to perform visually guided arm movements in a between-arms choice reaction time (RT) task. Percentages of preparation-related units, i.e. units whose change in activity during the preparatory period was correlated with RT, were 19% in PF, 31% in MI, 46% in PM and 68% in PP, respectively. These data support the hypothesis that neural pathways connecting PP association areas to MI, via PM, are involved mainly in movement planning.
Requin
J
J
Unit of Cognitive Neurosciences, National Center for Scientific Research, Marseilles, France.
Lecas
J C
JC
Vitton
N
N
D000818:Animals; D001132:Arm; D002540:Cerebral Cortex / Q000502:physiology*; D005071:Evoked Potentials; D000882:Haplorhini / Q000502:physiology*; D009044:Motor Cortex / Q000502:physiology*; D011597:Psychomotor Performance / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*