Lindblom, U. Properties of touch receptors in distal glabrous skin of the monkey. J. Neurophysiol. 28, 966–985 (1965).
Google Scholar
Johansson, R. S. & Westling, G. Signals in tactile afferents from the fingers eliciting adaptive motor responses during precision grip. Exp. Brain Res. 1, 141–154 (1987).
Goodwin, A. W. & Wheat, H. E. Sensory signals in neural populations underlying tactile perception and manipulation. Annu. Rev. Neurosci. 27, 53–77 (2004).
Google Scholar
Walcher, J. et al. Specialized mechanoreceptor systems in rodent glabrous skin. J. Physiol. 596, 4995–5016 (2018).
Google Scholar
Johansson, R. S. & Vallbo, Å. B. Tactile sensory coding in the glabrous skin of the human hand. Trends Neurosci. 6, 27–32 (1983).
Lee, B. B., Martin, P. R. & Valberg, A. Sensitivity of macaque retinal ganglion cells to chromatic and luminance flicker. J. Physiol. 414, 223–243 (1989).
Google Scholar
Cody, A. R. & Russell, I. J. The response of hair cells in the basal turn of the guinea-pig cochlea to tones. J. Physiol. 383, 551–569 (1987).
Google Scholar
Kennedy, H. J., Evans, M. G., Crawford, A. C. & Fettiplace, R. Fast adaptation of mechanoelectrical transducer channels in mammalian cochlear hair cells. Nat. Neurosci. 6, 832 (2003).
Google Scholar
Dimitriou, M. & Edin, B. B. Human muscle spindles act as forward sensory models. Curr. Biol. 20, 1763–1767 (2010).
Google Scholar
Verhagen, J. V., Wesson, D. W., Netoff, T. I., White, J. A. & Wachowiak, M. Sniffing controls an adaptive filter of sensory input to the olfactory bulb. Nat. Neurosci. 10, 631 (2007).
Google Scholar
Iggo, A. Cutaneous thermoreceptors in primates and sub-primates. J. Physiol. 200, 403–430 (1969).
Google Scholar
Ohmori, H. Mechanoelectrical transducer has discrete conductances in the chick vestibular hair cell. Proc. Natl. Acad. Sci. 81, 1888–1891 (1984).
Google Scholar
Halata, Z. Sensory innervation of the hairy skin (light-and electronmicroscopic study). J. Investig. Dermatol. 101, S75–S81 (1993).
Reinisch, C. M. & Tschachler, E. The touch dome in human skin is supplied by different types of nerve fibers. Ann. Neurol. 58, 88–95 (2005).
Google Scholar
Kabata, Y., Orime, M., Abe, R. & Ushiki, T. The morphology, size and density of the touch dome in human hairy skin by scanning electron microscopy. Microscopy 68, 207–215 (2019).
Google Scholar
Vallbo, A. B., Olausson, H. & Wessberg, J. Unmyelinated afferents constitute a second system coding tactile stimuli of the human hairy skin. J. Neurophysiol. 81, 2753–2763 (1999).
Google Scholar
Nolano, M., Provitera, V. & Crisci, C. Quantification of myelinated endings and mechanoreceptors in human digital skin. Ann. Neurol. 54, 197–205 (2003).
Google Scholar
Knibestöl, M. Stimulus-response functions of rapidly adapting mechanoreceptors in the human glabrous skin area. J. Physiol. 232, 427–452 (1973).
Google Scholar
Iggo, A. & Ogawa, H. Correlative physiological and morphological studies of rapidly adapting mechanoreceptors in cat’s glabrous skin. J. Physiol. (Lond.) 266, 277–296 (1977).
Burgess, P. R. et al. The neural signal for skin indentation depth. I. changing indentations. J. Neurosci. 3, 1572–1585 (1983).
Google Scholar
Wark, B., Lundstrom, B. N. & Fairhall, A. Sensory adaptation. Curr. Opin. Neurobiol. 17, 423–429 (2007).
Google Scholar
Hammock, M. L., Chortos, A., Tee, N.C.-K., Tok, J.B.-H. & Bao, Z. 25th anniversary article: The evolution of electronic skin (e-skin): A brief history, design considerations, and recent progress. Adv. Mater. (Deerfield Beach, Fla.) 25, 5997–6038 (2013).
Google Scholar
Lucarotti, C., Oddo, C. M., Vitiello, N. & Carrozza, M. C. Synthetic and bio-artificial tactile sensing: A review. Sensors 13, 1435–1466 (2013).
Google Scholar
Khan, S., Lorenzelli, L. & Dahiya, R. S. Technologies for printing sensors and electronics over large flexible substrates: A review. IEEE Sens. J. 15, 3164–3185 (2014).
Google Scholar
Chortos, A., Liu, J. & Bao, Z. Pursuing prosthetic electronic skin. Nat. Mater. 15, 937–950 (2016).
Google Scholar
Yogeswaran, N. et al. New materials and advances in making electronic skin for interactive robots. Adv. Robot. 29, 1359–1373 (2015).
Dahiya, R. et al. Large-area soft e-skin: The challenges beyond sensor designs. Proc. IEEE 107, 2016–2033 (2019).
Dario, P., De Rossi, D., Domenici, C. & Francesconi, R. Ferroelectric polymer tactile sensors with anthropomorphic features. In Proceedings. 1984 IEEE International Conference on Robotics and Automation, vol. 1, 332–340 (IEEE, 1984).
Son, J. S., Monteverde, E. A. & Howe, R. D. A tactile sensor for localizing transient events in manipulation. In Proceedings of the 1994 IEEE International Conference on Robotics and Automation, 471–476 (IEEE, 1994).
Wettels, N., Santos, V. J., Johansson, R. S. & Loeb, G. E. Biomimetic tactile sensor array. Adv. Robot. 22, 829–849 (2008).
Cutkosky, M. R. & Ulmen, J. Dynamic tactile sensing. In The Human Hand as an Inspiration for Robot Hand Development, 389–403 (Springer, 2014).
Wu, W., Wen, X. & Wang, Z. L. Taxel-addressable matrix of vertical-nanowire piezotronic transistors for active and adaptive tactile imaging. Science 340, 952–957 (2013).
Google Scholar
Kim, D. et al. A sensor array using multi-functional field-effect transistors with ultrahigh sensitivity and precision for bio-monitoring. Sci. Rep. 5, 12705 (2015).
Google Scholar
Pfeifer, R., Iida, F. & Bongard, J. New robotics: Design principles for intelligent systems. Artif. Life 11, 99–120 (2005).
Google Scholar
Müller, V. C. & Hoffmann, M. What is morphological computation? On how the body contributes to cognition and control. Artif. Life 23, 1–24 (2017).
Google Scholar
Dawson, J. C. & Adkins, C. J. Conduction mechanisms in carbon-loaded composites. J. Phys. Condens. Matter 8, 8321 (1996).
Google Scholar
Kang, J. H. et al. Piezoresistive characteristics of single wall carbon nanotube/polyimide nanocomposites. J. Polym. Sci. Part B Polym. Phys. 47, 994–1003 (2009).
Google Scholar
Genest, J. et al. Directly grown large area single-walled carbon nanotube films with very high sensitivity to normal pressure. J. Appl. Phys. 111, 023502 (2012).
Google Scholar
Hayes, W. C., Keer, L. M., Herrmann, G. & Mockros, L. F. A mathematical analysis for indentation tests of articular cartilage. J. Biomech. 5, 541–551 (1972).
Google Scholar
Stevanovic, M., Yovanovich, M. M. & Culham, J. R. Modeling contact between rigid sphere and elastic layer bonded to rigid substrate. IEEE Trans. Compon. Packag. Technol. 24, 207–212 (2001).
Hayward, V. et al. Spatio-temporal skin strain distributions evoke low variability spike responses in cuneate neurons. J. R. Soc. Interface 11, 20131015 (2014).
Google Scholar
Coste, B. et al. Piezo1 and piezo2 are essential components of distinct mechanically activated cation channels. Science 330, 55–60 (2010).
Google Scholar
Delmas, P., Hao, J. & Rodat-Despoix, L. Molecular mechanisms of mechanotransduction in mammalian sensory neurons. Nat. Rev. Neurosci. 12, 139–153. https://doi.org/10.1038/nrn2993 (2011).
Google Scholar
Zimmerman, A., Bai, L. & Ginty, D. D. The gentle touch receptors of mammalian skin. Science 346, 950–954 (2014).
Google Scholar
Gallego, G. et al. Event-based vision: A survey. IEEE Trans. Pattern Anal. Mach. Intell.https://doi.org/10.1109/TPAMI.2020.3008413 (2020).
Google Scholar
Lee, W. W. et al. A neuro-inspired artificial peripheral nervous system for scalable electronic skins. Sci. Robot. 4, eaax2198. https://doi.org/10.1126/scirobotics.aax2198 (2019).
Google Scholar
Ring, N. D. & Welbourn, D. B. A self-adaptive gripping device: Its design and performance. In Proceedings of the Institution of Mechanical Engineers, Conference Proceedings, vol. 183, 45–49 (SAGE Publications, 1968).
Stojiljković, Z. & Clot, J. Integrated behavior of artificial skin. IEEE Trans. Biomed. Eng. 4, 396–399 (1977).
Cohen, D. J., Mitra, D., Peterson, K. & Maharbiz, M. M. A highly elastic, capacitive strain gauge based on percolating nanotube networks. Nano Lett. 12, 1821–1825 (2012).
Google Scholar
Wu, Y. et al. A skin-inspired tactile sensor for smart prosthetics. Sci. Robot.3(22), eaat0429. https://www.nature.com/articles/s41598-020-74219-1#Bib1 (2018).
Kim, Y. et al. A bioinspired flexible organic artificial afferent nerve. Science 360, 998–1003 (2018).
Google Scholar
Lipomi, D. J. et al. Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes. Nat. Nanotechnol. 6, 788–792 (2011).
Google Scholar
Ward-Cherrier, B., Pestell, N. & Lepora, N. F. Neurotac: A neuromorphic optical tactile sensor applied to texture recognition. In 2020 IEEE International Conference on Robotics and Automation, 2654–2660 (IEEE, 2020).
Borton, D., Micera, S., Millán, J. . d. R. . & Courtine, G. Personalized neuroprosthetics. Sci. Transl. Med. 5, 210rv2-210rv2 (2013).
Google Scholar
Lim, S. et al. Transparent and stretchable interactive human machine interface based on patterned graphene heterostructures. Adv. Funct. Mater. 25, 375–383 (2015).
Google Scholar
Seo, J. & Lee, L. P. Effects on wettability by surfactant accumulation/depletion in bulk polydimethylsiloxane (PDMS). Sens. Actuators B Chem. 119, 192–198 (2006).
Google Scholar

