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Table 2 Summary of discrimination tasks

From: Discriminability of multiple cutaneous and proprioceptive hand percepts evoked by intraneural stimulation with Utah slanted electrode arrays in human amputees

Participant

Discrimination task

Total

conditions

Number of trials

Electrode(s)

Percept(s)

S3

Location

5

35

46

D4 tip

66

D5 tip

23

Palm

48

Wrist

46, 66, 23, 48 (simultaneous)

D4 tip, D5 tip, palm, wrist

S3

Location

4

24

26

Palm

45

D5 tip

26, 45 (simultaneous)

Palm, D5 tip, merging sensation

26, 45 (interleaved)

Palm, D5 tip

S4

Location

8

24

none

none

16

D5, palm

28

D5 side,

36

D4 Tip

16, 28

D5, palm, D5 side

16, 36

D5, palm, D4 tip

28, 36

D5 side, D4 tip

16, 28, 36

D5, Palm, D5 side, D4 tip

S3

Quality

2

30

39

Tingle

44

Vibration

S5

Intensity

4

20

none

none

76 (35 Hz)

Light pressure

76 (70 Hz)

Medium pressure

76 (100 Hz)

Heavy pressure

S5

Location-intensity

10

30

none

none

66 (30 Hz)

D3, light pressure

66 (70 Hz)

D3, medium pressure

66 (100 Hz)

D3, heavy pressure

59 (30 Hz)

Palm, light pressure

59 (70 Hz)

Palm, medium pressure

59 (100 Hz)

Palm, heavy pressure

8 (30 Hz)

D2, light pressure

8 (70 Hz)

D2, medium pressure

8 (100 Hz)

D2, heavy pressure

S5

Location-intensity

7

40

none

none

18 (100 Hz)

D2, 20° flex

18 (50 Hz)

D2, 50° flex

18 (150 Hz)

D2, 180° flex

24 (30 Hz)

D3, 10° flex

24 (80 Hz)

D3, 90° flex

24 (150 Hz)

D3, 180° flex