Experience-driven remodeling of S1 digit representation in awake monkeys: the challenge of comparing active and passive touch.
Many studies have compared active and passive touch to understand how motor action shapes touch perception. Current views emphasize the difficulties in making such a comparison and promote investigating how motor strategies enable the filtering out of sensory inputs to reshape touch perception. Cybulska-Klosowicz et al. (Cybulska-Klosowicz A, Tremblay F, Jiang W, Bourgeon S, Meftah E-M, Chapman CE. J Neurophysiol 123: 1072-1089, 2020) suggest that primary somatosensory (S1) cortical remodeling of digit representation occurs during active touch. Here, alternative interpretations are proposed, and the relevance of studying multidigit scanning is emphasized.