Fig. 4

Spike-LFP analysis in grouped ORNs of similar spike amplitudes. a, b Or83c was ectopically expressed in either ab5A or ab5B using the GAL4-UAS system. ORNs were selectively activated by the odorant, farnesol, at different concentrations. a Average LFP responses and the corresponding spike responses are shown for ab5A (blue traces) and ab5B ORNs (orange traces). b Peak spike responses are plotted as a function of peak LFP responses. Left panel: Lines indicate linear fits (y = ax + b). n = 9, mean ± s.e.m. Right panel: The respective “a” coefficients (spike/LFP slope) for ab5A and ab5B are plotted for comparison. Error bars = s.d. c–f Similar to (a, b) except that ab5 ORNs (c, d) or ac3I ORNs (e, f) were selectively activated by their cognate private odorants at different concentrations. n = 9 pairs of ORNs for (c, d) and six pairs for (e, f), mean ± s.e.m. Statistical analysis was performed with ANCOVA and significant differences (P < 0.05) are denoted by different letters. The P values are b 0.08; d 0.165; f 0.227. Source data are provided as a Source Data file. LFP local field potential, ORN olfactory receptor neuron, ANCOVA analysis of covariance