In a disconnected global Connectom with different cortical systems acting statistically independent from each other its just natural that specific subsystems processing perceptual modalities will disconnect from the Connectom and act independently also from incoming perceptual stimuli   
Imaging will involve reduced correlation matrix entries, and connectivity graphs will show disturbance of Small-World Network with reduced clustering coefficients. Whole brain dynamics over-time fluctuates with instability. Hubs of the Central Executive Network will have reduced degree. Treatment will have to reconnect and stabilize connectivity-optimization via intervention in the hubs
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). For loos-associations consider modulating global integration using Dorsolateral Prefrontal Hub-related tACS to reconnect global network (increase Gamma synchronization).