One of the earliest to attempts to localise specific functions to anatomical regions of the brain was that of Franz Joseph Gall,¹ who distinguished six varieties of memory, which he localised in the frontal lobes. Auburtin in 1864 related the faculty of language to the frontal lobes, and Broca² and Dax highlighted the left side of the brain.³ The right hemisphere was in some ways regarded as the minor hemisphere, a mirror of the left but without the hierarchically important function of language. Visual and sensory functions were thought to be equally represented in both sides of the brain. Hughlings Jackson first suggested in 1876 the possibility that right hemisphere lesions could produce symptoms and dysfunction not encountered in those with comparably placed lesions of the left hemisphere. Although his paper, addressed to an ophthalmic readership, concentrated on the absence of papilloedema, he undoubtedly described imperception, though not …