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The unresponsive wakefulness syndrome (UWS), also known as the vegetative state (VS), is one of the most dramatic outcomes of acquired brain injury. This medical discipline, called "elderly care medicine" (formerly known as nursing home medicine), is dedicated to patient-centered care for the elderly, but also for young patients with the severest sequelae of neurological diseases.[[25]] Dutch elderly care medicine has a tradition of research whose topics include VS/UWS. Especially when a prolonged period of time, up to 18 days, went by between the moment of ANH withdrawal and the patient passing away, physicians described a "burden of witness,"[50] as experienced by both themselves and the patients' families. That critical decisions about the medical treatment of some of the most helpless patients in modern medicine can be made by dedicated physicians, in close deliberation with those patients' relatives and without judicial, legal, or media interference, can be considered a merit. [Extracted from the article]

Objective: The relationship between residual brain tissue in patients with disorders of consciousness (DOC) and the clinical condition is unclear. This observational study aimed to quantify gray (GM) and white matter (WM) atrophy in states of (altered) consciousness.Methods: Structural T1-weighted magnetic resonance images were processed for 102 severely brain-injured and 52 healthy subjects. Regional brain volume was quantified for 158 (sub)cortical regions using Freesurfer. The relationship between regional brain volume and clinical characteristics of patients with DOC and conscious brain-injured patients was assessed using a linear mixed-effects model. Classification of patients with unresponsive wakefulness syndrome (UWS) and minimally conscious state (MCS) using regional volumetric information was performed and compared to classification using cerebral glucose uptake from fluorodeoxyglucose positron emission tomography. For validation, the T1-based classifier was tested on independent datasets.Results: Patients were characterized by smaller regional brain volumes than healthy subjects. Atrophy occurred faster in UWS compared to MCS (GM) and conscious (GM and WM) patients. Classification was successful (misclassification with leave-one-out cross-validation between 2% and 13%) and generalized to the independent data set with an area under the receiver operator curve of 79% (95% confidence interval [CI; 67-91.5]) for GM and 70% (95% CI [55.6-85.4]) for WM.Interpretation: Brain volumetry at the single-subject level reveals that regions in the default mode network and subcortical gray matter regions, as well as white matter regions involved in long range connectivity, are most important to distinguish levels of consciousness. Our findings suggest that changes of brain structure provide information in addition to the assessment of functional neuroimaging and thus should be evaluated as well. Ann Neurol 2018;83:842-853. [ABSTRACT FROM AUTHOR]