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. 2002 Feb 1;538(Pt 3):995–1002. doi: 10.1113/jphysiol.2001.013087

Figure 2. Types of SA responses in the foot sole.

Figure 2

In response to a maintained force application, two slow adapting responses were observed in the foot sole. An example of the discharge activity and the location of the receptive fields for a SAI receptor (A) and a SAII receptor (B), as well as their adaptation properties are presented. Ten consecutive waveforms are aligned and overlapped to demonstrate that these were indeed single-unit recordings. It is important to note that there was no spontaneous activity in the absence of any intentionally applied stimulation in any of the cutaneous receptors in the foot sole.