Figure 4. Change in stimulation frequency alters spike firing in olfactory receptor neurons expressing the I7 odorant receptor.
Suction pipette recordings from an olfactory receptor neuron expressing the I7 odorant receptor stimulated at increasing concentrations of heptanal, the I7 agonist. A stimulus train at 2 Hz was followed by 5 Hz stimulations; each odorant exposure was 100 ms. Recording bandwidth 0–5 kHz (black) and 0–50 Hz (red).