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.
Mercer County is ideally located in the Bluegrass Region of Kentucky near the center of the state, 32 miles from Lexington and, I-75 via Bluegrass Parkway, 75 miles from Louisville via US 127 and I-64 and 110 miles from Cincinnati via I-75 North.