| Type of NP (number of articles) | Implantable sensors/electrodes | Micro- and nanotechnologies | Manufacturing materials |
| Implantable motor neuroprosthesis (18) | 7/18 [5, 28–33] | | 2/18 [5, 31] | Cochlear implant (15) | 6/15 [34–39] | 4/15 [40–43] | 2/15 [41, 44] | Retinal prosthesis (13) | 9/13 [39, 45–51] | | 3/13 [39, 46, 52] | Deep brain stimulator (31) | 10/31 [53–62] | 9/31 [63–71] | 6/31 [59, 72–76] | Cardiac pacemaker (16) | 4/16 [77–80] | 1/16 [81] | 9/16 [78, 82–89] | Bladder implant (6) | 3/6 [90–92] | 2/6 [93, 94] | 1/6 [95] | Nonspecific applications (54) | 13/54 [96–108] | 24/54 [42, 63, 65, 67–70, 75, 93, 106, 109–122] | 11/54 [3, 55, 59, 66, 72–74, 76, 118, 123, 125] | 153/364 | 52/153 | 40/153 | 34/153 |
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