Table 1.
Performance of the classifier (recognition ratio) with re-training of the classification algorithm
| Task(s) identified | rr | M1 channel # | M2 channel # | U channel # | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (%) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
| rest vs little | 93 | -- | -- | -- | -- | X | -- | -- | -- | X | X | -- | X |
| rest vs palmar | 95 | X | -- | -- | -- | -- | X | -- | -- | X | -- | -- | -- |
| rest vs pinch | 100 | -- | X | -- | X | X | -- | -- | X | -- | X | -- | -- |
| rest vs little vs palmar | 92 | -- | X | -- | -- | X | -- | X | -- | -- | X | -- | X |
| rest vs little vs pinch | 90 | -- | X | -- | X | -- | X | -- | X | -- | -- | X | -- |
| rest vs pinch vs palmar | 87 | -- | -- | X | -- | X | -- | -- | -- | -- | -- | -- | X |
| rest vs little vs pinch vs palmar | 85 | -- | X | -- | -- | X | -- | X | -- | X | X | -- | -- |
| rest vs activity | 87 | -- | -- | -- | X | X | X | X | X | -- | X | X | X |
| little vs pinch vs palmar | -- | X | X | -- | -- | -- | -- | X | -- | X | -- | X | |
The parameters of the classifier were selected for each day using data recorded in that specific day for the training. For each classification, the max performance (rr) and the best combination of channels used are given. rr = recognition ratio of the SVM classifier; M1 an M2 indicate the two tfLIFE implanted in the median nerve whereas U indicates the tfLIFE implanted in the ulnar nerve.