Page 227 - Handbook of Biomechatronics

224 Georgios A. Bertos and Evangelos G. Papadopoulos

Fig. 24 Restoration of ability to discriminate textural features of a transradial amputee.
Experimental setup and performance metrics. (A) Sensorized artificial finger and tactile
stimulation platform. (B) Tactile stimuli that were used in the three-alternative forced-
choice (3AFC) psychophysical protocol and the raster plot of spike trains that were gen-
erated in all sessions with one subject by the artificial finger while the gratings were slid.
(C) Setup of percutaneous electrical microstimulation (left) and implanted intrafascicular
stimulation (right) of the median nerve, and discrimination performance during all
experimental sessions involving four intact subjects and one transradial upper-limb
amputee. Source data of the spike trains that were transduced by the artificial finger
while the gratings were indented and slid over have been deposited in Dryad (Oddo
et al., 2016). Such spikes were used to trigger the neural stimulator in all the experimen-
tal sessions with DAS amputee (raster plot depicted in (B). (From Oddo, C.M.,
Raspopovic, S., Artoni, F., Mazzoni, A., Spigler, G., Petrini, F., … Micera, S., 2016. Intraneural
stimulation elicits discrimination of textural features by artificial fingertip in intact and
amputee humans. elife, 5, e09148. https://doi.org/10.7554/eLife.09148.)