“…Pioneering electrophysiological studies identified motor areas in the cortex of the common dolphin (Kesarev, 1971; Kesarev & Malofeeva, 1969; Lende & Akdikmen, 1968) and the unique pattern of sleep of the pilot whale and bottlenose dolphin (Mukhametov, Supin, & Polyakova, 1977; Serafetinides, Shurley, & Brooks, 1971; Shurley, Serafetinides, Brooks, Elsner, & Kenney, 1969). Evoked‐potential sensory areas were formally identified (Ladygina, Mass, & Supin, 1978; Popov, Ladygina, & Supin, 1986; Popov & Supin, 2007; Sokolov et al, 1972), including the visual area, in the harbor porpoise Phocoena phocoena and bottlenose dolphin. Two zones were identified based on quicker (V1) or slower (V2) neuron firing, and mapped along the medial edge of the hemispheres (Figure 1) and not in the occipital position known in most mammals (Morgane, Jacobs, & Galaburda, 1986; Supin et al, 2001; for general reference see Cozzi et al, 2017; Huggenberger, Oelschläger, & Cozzi, 2019).…”