Table 1.
Subjective description of the proprioceptive illusion effect for all subjects
| Subject | Intensity* | Description of proprioceptive illusion | Description of unnatural sensation |
|---|---|---|---|
| #1 | 3 | Forearm is pushed down by external force | Tingling, vibrating, paresthesia |
| #2 | 3 |
Forearm is moving downward Vibrating/scratching on the skin |
Tingling, vibrating, pulsing, paresthesia |
| #3 | 3 |
Forearm is moving downward Vibrating on the skin |
Tingling, vibrating |
| #4 | 3 | Forearm is pushed down by external force | Tingling |
| #5 | 3 | Forearm is pushed down by external weight Vibrating/scratching on the skin | Tingling, itchiness |
| #6 | 4 | Forearm is moving downward | Tingling |
| #7 | 4 | Forearm is pushed down by external force | Tingling |
| #8 | 3 | Forearm is moving downward | Tingling, pulsing |
Intensity and subjects’ description of the proprioceptive illusion, along with subjects’ description of the unnatural electrotactile sensation accompanied with the proprioceptive illusion
*Intensity of proprioceptive illusion on 1–5 scale (1—nothing, 2-—barely perceivable, 3—perceivable, 4—strong, 5—very strong)