Increased Firing Irregularity as an Emergent Property of Neural-State Transition in Monkey Prefrontal Cortex
Figure 3
The firing variability of F-I neurons increases before the representational transitions.
(A) The average LVR increases in three epochs (final goal display, delay before transitions, and delay after transitions) from the initial value (start display; 1.11) (n = 148). (B–D) Increases from the initial values of firing variability: LV, 0.88 (B); SI, 0.28 (C); IR, 1.21 (D). (E and F) Increases in the firing variability of the putative excitatory (n = 110; E) and inhibitory neurons (n = 38; F). The initial values are 1.12 and 1.08, respectively. Start display, −700 to −800 ms; final goal display, 400 to 500 ms; delay before transitions, 1100 to 1200 ms from the final-goal onset; delay after transitions, 200 to 300 ms after F-I transition. Error bars = SEM; *, P<0.05; **, P<0.01 (t-test).
