Figure 4. The relationship between the number of action potentials evoked and the flow through dentine produced by hydrostatic pressure stimuli.

The number of action potentials evoked per 5 s stimulus was counted in both the multi-fibre records from dentine (A) and the single-unit records (B). Flow was measured 1 s after the application of a pressure stimulus. The data are from the same preparation as the records in Fig. 3.