 Many of the disorders that we have considered are fairly directly a result of changes to the brain. Cognitive neuroscience is the study of the relationship between the two. The best-known objects of such study in connection with unified consciousness are brain bisection operations (commissurotomies). Other neuroscientific studies relevant to unified consciousness have examined blindsight (Weiskrantz 1986), blindsight with visual agnosia (van Gulick 1994), hallucinations and thought insertion (Stephens &amp; Graham 2000), and archaic hand syndrome and delusions of control in schizophrenia (Mylopoulos 2015). 