TY - JOUR
T1 - Paradigmatic Working Memory (Attractor) Cell in IT Cortex
AU - Amit, Daniel J.
AU - Fusi, Stefano
AU - Yakovlev, Volodya
PY - 1997/7/1
Y1 - 1997/7/1
N2 - We discuss paradigmatic properties of the activity of single cells comprising an attractor - a developed stable delay activity distribution. To demonstrate these properties and a methodology for measuring their values, we present a detailed account of the spike activity recorded from a single cell in the inferotemporal cortex of a monkey performing a delayed match-to-sample (DMS) task of visual images. In particular, we discuss and exemplify (1) the relation between spontaneous activity and activity immediately preceding the first stimulus in each trial during a series of DMS trials, (2) the effect on the visual response (i.e., activity during stimulation) of stimulus degradation (moving in the space of IT afferents), (3) the behavior of the delay activity (i.e., activity following visual stimulation) under stimulus degradation (attractor dynamics and the basin of attraction), and (4) the propagation of information between trials - the vehicle for the formation of (contextual) correlations by learning a fixed stimulus sequence (Miyashita, 1988). In the process of the discussion and demonstration, we expose effective tools for the identification and characterization of attractor dynamics.
AB - We discuss paradigmatic properties of the activity of single cells comprising an attractor - a developed stable delay activity distribution. To demonstrate these properties and a methodology for measuring their values, we present a detailed account of the spike activity recorded from a single cell in the inferotemporal cortex of a monkey performing a delayed match-to-sample (DMS) task of visual images. In particular, we discuss and exemplify (1) the relation between spontaneous activity and activity immediately preceding the first stimulus in each trial during a series of DMS trials, (2) the effect on the visual response (i.e., activity during stimulation) of stimulus degradation (moving in the space of IT afferents), (3) the behavior of the delay activity (i.e., activity following visual stimulation) under stimulus degradation (attractor dynamics and the basin of attraction), and (4) the propagation of information between trials - the vehicle for the formation of (contextual) correlations by learning a fixed stimulus sequence (Miyashita, 1988). In the process of the discussion and demonstration, we expose effective tools for the identification and characterization of attractor dynamics.
UR - http://www.scopus.com/inward/record.url?scp=0031182939&partnerID=8YFLogxK
U2 - 10.1162/neco.1997.9.5.1071
DO - 10.1162/neco.1997.9.5.1071
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C2 - 9188192
AN - SCOPUS:0031182939
SN - 0899-7667
VL - 9
SP - 1071
EP - 1092
JO - Neural Computation
JF - Neural Computation
IS - 5
ER -