Vol. 66, No. 3, September 199 1.Printed in U.S.A.
Saccade-Related Activity in the Lateral Intraparietal Area
II. Spatial Properties
SHABTAI BARASH, R. MARTYN BRACEWELL, LEONARDO FOGASSI, JAMES W. GNADT, AND
RICHARD A. ANDERSEN
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139,
Istituto di Fisiologica Umana, Parma University, Parma 43100, Italy; and Department of Physiological Optics,
University of Alabama, Birmingham, Alabama 35294
SUMMARY AND CONCLUSIONS
1. Single-neuron activity was recorded from the inferior pari-
eta1lobule (IPL) of Macaca mulatta monkeys while they were
performing delayed saccadesand related tasks. Temporal charac-
teristics of this activity were presented in the companion paper.
Here we focus on the spatial characteristics of the activity. The
analysiswas basedon recordings from 145 neurons. All theseneu-
rons were from the lateral intraparietal area (LIP), a recently de-
fined subdivision of the IPL.
2. Delayed saccadeswere made in eight directions. Direction-
tuning curves were calculated for each neuron, during each of the