Table 1.

Profiles of cutaneous mechanoreceptors in the foot sole

					Receptive field size (mm2)
Type	Number	Per cent of total	Median threshold (mN)	Range (mN)	Median	Range
SAI	15	14.4	35.6	4–744	70.9	11.8–277.5
SAII	16	15.4	115.3	36–2800	127.4	44.0–296.2
FAI	59	56.7	11.8	0.7–282	38.0	5.8–333.6
FAII	14	13.5	4.0	0.5–2800	284.2	41.7–1248.0
Total	104	100	—	—	—	—

The total number of units for each subpopulation, the threshold levels as estimated with calibrated nylon monofilaments, and the receptive field properties were calculated.