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JOURNAL OF NEUROPHYSIOLOGY Vol. 76, No. 3, September 1996. Printed in U.S.A.
 

Summary: JOURNAL OF NEUROPHYSIOLOGY
Vol. 76, No. 3, September 1996. Printed in U.S.A.
Motor Intention Activity in the Macaque's Lateral Intraparietal Area.
II. Changes of Motor Plan
R. MARTYN BRACEWELL, PIETRO MAZZONI, SHABTAI BARASH, AND RICHARD A. ANDERSEN
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02 I39
SUMMARY AND CONCLUSIONS
1. In the companion paper we reported that the predominant
signal of the population of neurons in the lateral intraparietal area
(area LIP) of the monkey's posterior parietal cortex (PPC) encode
the next intended saccadic eye movement during the delay period
of a memory-saccade task. This result predicts that, should the
monkey change his intention of what the next saccade will be, LIP
activity should change accordingly to reflect the new plan. We
tested this prediction by training monkeys to change their saccadic
plan on command and recording the activity of LIP neurons across
plan changes.
2. We trained rhesus monkeys (Macaca rnulatta) to maintain
fixation on a light spot as long as this spot remained on. During
this period we briefly presented one, two, or three peripheral visual

  

Source: Andersen, Richard - Division of Biology, California Institute of Technology

 

Collections: Biology and Medicine