Extended Data Fig. 4: Training paradigm for negative reinforcement assay.
From: Chemosensory modulation of neural circuits for sodium appetite

a, A diagram of the training paradigm using foot shock (FS). Each lever press pauses continuous foot shock for 20 s. b, Total number of lever presses in each condition during the 30-min session (n = 5 for eYFP and n = 6 for ChR2). c, Animals were conditioned to press the lever without foot-shock pre-training sessions (n = 6). *P < 0.05 by two-tailed Wilcoxon test. Data are mean ± s.e.m.