 In this way, MIB is like binocular rivalry, where hemispheric manipulations using caloric vestibular stimulation (or TMS) also require the correct combination of cerebral hemisphere and phase (1/4 possibilities).From these observations, it can be argued that MIB is an interhemispheric switching phenomenon, an unexpected member of the class of rhythmic, biphasic, perceptual rivalries such as binocular rivalry and plaid motion rivalry.In this formulation, the disappearance in MIB can be understood in terms of the cognitive style of the Left hemisphere, which chooses a single possibility from the many, and ignores or “denies” the others (denial being one of the characteristic defence mechanisms of the Left, which becomes exaggerated in the Left hemisphere bias of mania).