Essential McLuhan 360 ongoing in the left hemisphere could easily be verbally described by the patients; information presented to the right hemisphere went undescribed” (Michael S.Gazzaniga, “Review of the Split Brain,” 91). In subsequent tests of patients that had undergone commissurotomy, the complementarity of the two hemispheres became increasingly evident. Most surprising was the range of activities proper to the right hemisphere, which in the nineteenth century carried the label of “minor” the simultaneous, holistic, and synthetic, there are good reasons for indicating it as the “acoustic” (qualitative) side of the brain. We are not Argus-eyed, but Argus-eared. Visual space is the result of left-hemisphere dominance in a culture, and its use is restricted to those cultures that have immersed themselves in the phonetic alphabet and thereby suppressed the activity of the right hemisphere. 3 Since, as Jeremy Campbell points out in Grammatical Man, alphabetic consonants and much of syntax are products of the left hemisphere, visual space is an extrapolation into the environment of the left brain in high definition—abstract, structured as a figure minus a ground. Acoustic space has the basic character of a dynamic sphere whose focus or centre is simultaneously everywhere and whose margin or periphery is nowhere. As it is multisensory, involving both the interval of tactility and kinetic equilibrium-pressure, it is one of the many figure/ground right-hemisphere forms of space. Ordinarily, the two hemispheres are in constant dialogue through the corpus callosum, and each hemisphere uses the other as its ground except when one (i.e., the left) is habitually dominant. Each hemisphere, as it were, provides a particular type of information processing less available to the other. As Dr. J.E.Bogen notes, “the type of cognition proper to the right hemisphere has been called appositional, a usage parallel to the common use by neurologists of propositional to encompass the left hemisphere’s dominance for speaking, writing, calculation and related tasks.”4 The individual features of the face, as isolated figures, are easily noted by the left hemisphere, which cannot handle them together as a pattern. It is the “acoustic” power of simultaneous comprehension that gives the right hemisphere the ability to recognize faces. By the same token, the sense of touch creates the space of the “resonant interval”: interval defines the relation of figure to ground and provides the structure, the con- figuration of ground. Synesthetic interplay or “quiet.” So complete was our culture’s visual bias at that time, it was seriously proposed that the right hemisphere made no contribution to human intellection or activity. 3 Page 224: “It is well known that the right brain is poor at comprehending consonants and does not do well at syntax, which is the left brain’s special province. How far this is a sheer absence of function, and how far it is an effect of