Summary: Quantitative Comparison Between Neural Response in Macaque
Inferotemporal Cortex and Behavioral Discrimination of Photographic Images
Sarah R. Allred and Bharathi Jagadeesh
Program in Neurobiology and Behavior, Department of Physiology and Biophysics, University of Washington, Seattle, Washington
Submitted 5 January 2007; accepted in final form 26 June 2007
Allred SR, Jagadeesh B. Quantitative comparison between neural
response in macaque inferotemporal cortex and behavioral discrimi-
nation of photographic images. J Neurophysiol 98: 12631277, 2007.
First published June 27, 2007; doi:10.1152/jn.00016.2007. Inferotem-
poral (IT) cortex plays a critical role in the primate ability to perceive
and discriminate between images, but the relationship between re-
sponses of single neurons and behavioral capacities is poorly under-
stood. We studied this relationship by recording from IT neurons
while monkeys performed a delayed-match-to-sample task with two
images. On each day, two sample images were chosen to maximize
the selectivity of the neuron and task difficulty was manipulated by
varying sample duration and by masking the sample. On each trial,
monkeys reported which of the two sample images was presented.
Neural performance was described using an ideal-observer analysis.
Across the population, neural and behavioral sensitivity to changes in