Communication breakdown: delta-9 tetrahydrocannabinol effects on pre-speech neural coherence

Synchronised neural oscillations preceding speech generation are reduced in patients with schizophrenia, this deficit being implicated in symptom formation. We measured synchronisation of neural oscillations preceding vocalisation in the presence of delta-9 tetrahydrocannabinol (THC) and found they were significantly disrupted. Furthermore, the degree of disruption was related to THC-induced symptoms, suggesting THC may modulate a similar neural substrate to schizophrenia.