Figure 6.

Intracellular recording reveals most mitral cells respond to only one of seven test mixtures. A, A mitral cell is activated only by mixture 5. a1–a7, The top panel shows the raster plots and poststimulus time histogram constructed from presentation of the seven mixtures. The bottom panel shows the net membrane potential change during odor stimulation. Only mixture 5 induces responses. The number of stimulus presentations is shown in parentheses. B, Quantification of net membrane potential change induced by each mixture during odor delivery. ***p < 0.001, Student's t test versus mineral oil (vehicle only).