FIGURE 5.

Profile peak frequency and activity of local spines. A schematic diagram of the hypothesized relationship between the peak frequency of a profile curve and the internal voltage level produced by subthreshold activity of an increasing number of local dendritic spines. The rate of outward (radial) potassium flow is denoted by g_r. Levels of spine voltage are low, medium, and high; number of active channels are small, medium, and large; and levels of g_r are low, medium, and high (Kasevich and LaBerge, 2011).