Thomas Williams

Thomas M. Williams is a neuroscientist specialising in human neuroimaging and electrophysiology of altered states of consciousness induced by psychedelic compounds. His work has focused on multi-modal characterisation of network- and signal-level changes under psilocybin and LSD, including studies linking increased global functional connectivity to subjective experiences such as ego-dissolution and identifying broadband cortical desynchronisation as a mechanistic substrate of the psychedelic state. Williams has collaborated with leading psychedelic research groups to apply functional MRI and EEG measures to both healthy volunteers and clinical populations, and to interpret those findings in the context of psychotherapy and early psychosis models.

In addition to basic neurophysiological studies, Williams has contributed to translational and clinical lines of research, including safety and tolerability assessments of MDMA-assisted psychotherapy in substance use disorders and work exploring implications of neuroimaging results for psychedelic-assisted psychotherapy. His publications and collaborative projects bridge mechanistic neuroscience, clinical trial design, and theoretical frameworks (e.g., network integration, desynchronisation/entropic accounts) that aim to explain therapeutic and adverse responses to psychedelic interventions.