In order to determine whether the LR neurons are a truly distinct cell
type, we sought to identify the physiological properties that can
clearly distinguish them from other neurons in the superficial RSG.
Specifically, using features such as rheobase, input capacitance, input
resistance, and spike width, we were able to isolate the LR cells from
both FS and RS cells (Figure 2). LR cells cluster clearly and separately
from FS and RS cells based on these intrinsic properties, suggesting
they are a unique and distinct subtype of neuron compared to the others
included in this study.