Table 3. Perceived sensations elicited from small-scale pulse width modulation on all available channels.

Perceived sensations elicited from small-scale pulse width modulation on all available channels.. Constant pressure sensation was commonly associated with glabrous skin location on the perceived hand.

Median			Ulnar			Radial
Ch.	Perceived location skin type	Small-scale PW modulation sensation	Ch.	Perceived location skin type	Small-scale PW modulation sensation	Ch.	Perceived location skin type	Small-scale PW modulation sensation
M1	Hairy	Itch, tingle, pulse	U1	Hairy	Constant vibration	R1	Hairy	Tingling
M2	Glabrous	Constant pressure	U2	—	No response	R2	Hairy	Constant pressure
M3	Glabrous	Constant pressure	U3	Glabrous, hairy	Tingling	R3	Hairy	Tingling
M4	Glabrous	Constant pressure	U4	Hairy	Tingling	R4	Hairy	Hair movement, cotton ball
M5	Glabrous	Constant pressure	U5	Glabrous	Constant pressure, Itch
M6	Deep	N.T.*	U6	Glabrous, hairy	Constant pressure
M7	Hairy	Constant pressure	U7	Glabrous	Constant pressure
M8	Glabrous, hairy	Constant pressure	U8	—	N.T.^†

*Not tested: usually stimulation on M6 resulted in uncomfortable sensations.

†Not tested: connector needed replacement. External connector lasted 1.6 years before requiring simple replacement.