Scientists have been able to reach into the mind of a brain-damaged man and communicate with his thoughts. The research, carried out in the UK and Belgium, involved a new brain scanning method. Awareness was detected in three other patients previously diagnosed as being in a vegetative state. The study in the New England Journal of Medicine shows that scans can detect signs of awareness in patients thought to be closed off from the world. Patients in a vegetative state are awake, not in a coma, but have no awareness because of severe brain damage. The scientists used functional magnetic resonance imaging (fMRI) which shows brain activity in real time.
Brain imaging has allowed a man who was previously considered unconscious to answer a series of yes-or-no questions. The study, published this week in the New England Journal of Medicine1, challenges clinicians' definition of consciousness and provides an unprecedented opportunity to communicate with those who show no outward signs of awareness.
Background The differential diagnosis of disorders of consciousness is challenging. The rate of misdiagnosis is approximately 40%, and new methods are required to complement bedside testing, particularly if the patient's capacity to show behavioral signs of awareness is diminished. Conclusions These results show that a small proportion of patients in a vegetative or minimally conscious state have brain activation reflecting some awareness and cognition. Careful clinical examination will result in reclassification of the state of consciousness in some of these patients. This technique may be useful in establishing basic communication with patients who appear to be unresponsive.
On the face of it, the decision by a High Court judge in the case of M is no surprise - few would have expected a ruling to allow a patient with any level of consciousness and feeling to die. But a closer inspection of the 76-page judgement shows that Mr Justice Baker did not find his decision a straightforward one.
National clinical guidelines on the care of people in a vegetative or minimally conscious state, following severe brain injury These long-awaited guidelines will be a major contribution to clinical and ethical standards of care for this group of patients, not only in the UK but internationally. For England and Wales, they provide much needed clarity on legal decision-making. You can buy a print copy of the guidelines (130 pp, £15) from our online shop, or download a free PDF below. The guidelines were developed by a panel of experts in the field, who have organised complicated and wide-ranging information into six coherent sections: 1 Defining criteria and terminology 2 Assessment, diagnosis and monitoring 3 Acute to longer-term management 4 Ethical and medico-legal issues 5 End-of-life issues 6 Service organisation and commissioning Each section is followed by a set of clear recommendations.