Short-Term Memory Trace in Rapidly Adapting Synapses of Inferior Temporal Cortex
Figure 7
Performance on the DMS task of the deterministic matched filter model.
(A) Performance of the deterministic matched filter model using the data from the recorded sample of 35 TE neurons. The left column shows the eight stimuli presented to the model as the sample, and the top row shows the eight stimuli presented as the test image. At the intersection of each row and column is the average response of all the estimates across 35 TE neurons using the matched filter model. The upper-left to lower-right diagonal shows the matched filter outputs for the eight sample-match pairs. The off diagonals show the matched filter outputs for the 56 sample-nonmatch pairs. The model gave the best discrimination performance with the threshold set to 6.15 spikes per 400 ms epoch, i.e., the model made the fewest mistakes. The blue values show correct matches (hits), and the green responses show the correct nonmatches (correct rejections). The orange values show misses, and the red values show false alarms. This model got 32/64 = 50% of the trials correct. (B) Performance of the matched filter model for perirhinal neurons with inputs from encoder stage estimate. At the intersection of each row and column is the average response of all the estimates across 11 perirhinal neurons using the matched filter model. With the threshold set to 4.55 spikes per 400 ms epoch, the model achieved its best performance, getting 35/64 = 55% of the trials correct.