Extended Data Fig. 4: Evoked responses in single units across days.

a, Activity of eight single units across a 32-day interval selected to illustrate the diversity of odour-evoked response profiles across single units within each day and within individual single units across days. Columns separate test odorants (chemical names, top). Spike rasters (rows: 7 trials per day) and PSTHs are coloured by day as indicated. Horizontal black bars, 4-s odorant stimulus epochs. The single-unit responses to individual stimuli shown in Fig. 1b are replotted here alongside responses for those single units to the seven other stimuli in the panel: Fig. 1b, left: unit 1, stimulus 7 (linalool oxide); Fig. 1b, middle: unit 2, stimulus 5 (nerol); Fig. 1b, right: unit 3, stimulus 2 (geranyl nitrile). b, z-scored odour-evoked activity of 300 randomly selected odour–unit pairs during the 4-s odorant stimulus epoch (black bars), ordered differently in each panel. Left, ordered by odour response magnitude on day 0 (replotted from Fig. 1c); middle, ordered by odour response magnitude on day 32; right, ordered by odour response magnitude individually on each day.