Editing Gustav Fechner (section)

=== Corpus callosum split ===
One of Fechner's speculations about consciousness dealt with brain. During his time, it was known that the brain is bilaterally symmetrical and that there is a deep division between the two halves that are linked by a connecting band of fibers called the [[corpus callosum]]. Fechner speculated that if the [[Corpus callosotomy|corpus callosum were split]], two separate streams of consciousness would result - the mind would become two. Yet, Fechner believed that his theory would never be tested; he was incorrect. During the mid-twentieth century, [[Roger Wolcott Sperry|Roger Sperry]] and [[Michael Gazzaniga]] worked on epileptic patients with sectioned corpus callosum and observed that Fechner's idea was correct.<ref>[Gazzinga, M.S (1970). The bisected brain. New York: Appleton-Century-Crofts]</ref>