Neurorehabilitation in Patients With Disorders of Consciousness: Multidimensional Ambispective Study on the Impact of Single and Combined Approaches

Disorders of consciousness (DOC), such as the vegetative state/unresponsive wakefulness syndrome (VS/UWS) and the minimally conscious state (MCS), represent severe clinical conditions arising from acquired brain injury (ABI), exerting a profound impact on patients, caregivers, and healthcare systems. The clinical heterogeneity, diagnostic challenges, and paucity of robust evidence on the comparative efficacy of rehabilitation interventions underscore the need for a deeper understanding of the underlying neurophysiological, cognitive, and biological mechanisms involved in consciousness recovery. This monocentric ambispective observational study aims to investigate the effects of advanced neurorehabilitation treatments-including multimodal sensory stimulation, non-invasive neuromodulation via transcranial magnetic stimulation (TMS) or transcranial direct current stimulation (tDCS), and the use of augmentative and alternative communication (AAC) devices with eye-tracking-on various facets of residual consciousness in patients diagnosed with DOC admitted to the Neurorehabilitation Unit of the IRCCS Centro Neurolesi "Bonino Pulejo" in Messina. The study design encompasses the collection of clinical and rehabilitation data from hospitalized patients undergoing treatment, both retrospectively and prospectively. Specifically, data from patients admitted and treated in the 36 months preceding study initiation, as well as those admitted and treated in the subsequent 36 months, will be included. Upon data collection, participants will be classified a posteriori as "responders" or "non-responders" based on whether they meet at least one of the following criteria: (I) an increase of ≥3 points on the Coma Recovery Scale-Revised (CRS-R) from baseline or a clinically relevant state transition (e.g., VS/UWS → MCS; MCS → emergence from MCS \[EMCS\]); (II) an increase of ≥10 points on the Functional Independence Measure (FIM) or ≥0.5 standard deviations (SD) from baseline; (III) an i