Figure 1. Frequency coding in the nervous system: Threshold stimulus. 1  If a threshold stimulus is applied to a neuron and maintained (top, red trace), action potentials occur at a maximum frequency that is limited by the sum of the absolute and relative refractory periods (bottom, blue trace).
Phyllis, Kentucky. Phyllis is an unincorporated community located in Pike County, Kentucky, United States. U.S. Geological Survey Geographic Names Information System: Phyllis, Kentucky.
Sponsored Topics. Bloomfield is a city in Nelson County, Kentucky, United States. The population was 855 at the 2000 census. Bloomfield is located at 37Â°54â²52â³N 85Â°19â²9â³W / 37.91444Â°N 85.31917Â°W / 37.91444; -85.31917 (37.914332, -85.319232).