Figure 4.

Complex terminal trees affect nociceptive gain partially by virtue of the length of their conductive parts. A, Scheme of the experiment, the length of the common branch (green) was changed without changing the number of terminal branches. All terminals were simultaneously stimulated by a capsaicin-like current, and the resulted activity was measured at the central terminal. B, Number of APs recorded at the central terminal (left) and their peak instantaneous frequency (right) plotted as a function of the length of the common branch.