A: Mean (± SEM) entropy values (H) of neurons recorded along with mediolateral (left) and rostrodaucal (right) axis in the PbN. B: Mean (± SEM) noise-to-signal (N/S) ratio of neurons recorded along with mediolateral (left) and rostrodaucal (right) axis in the PbN. *P < 0.05. C: Correlation between H and N/S ratio. Correlation coefficients between H and N/S ratio for neurons recorded in the medial, BC, lateral, rostral and caudal subdivisions were 0.80, 0.73, 0.79, 0.79 and 0.76, respectively.