Unimodal cortical processor becomes disconnected from the global network of active executive computation, (the Central Executive  network) as well as from external input.    
Activated cortical regional network statistically independent from the rest of the brain. Correlation matrix with cortical biased relevant entries. Graph analysis shows increase connections within cluster of region and reduced connectivity to and from  relevant clustered networks Treat by suppression and re-synchronization of region activity
Traditionally antipsychotics are administrated theoretically also consider locally focused cortical low-frequency suppressive TMS. For modulating global integration consider Dorsolateral Prefrontal Hub-related transcranial Alternating Current Stimulation (tACS) to modulate global network (Gamma activity). Consider administering Hallucinations-related specific Virtual-Reality environments (personalized controlled talking Avatars).