The long-term outcome of persons with impaired consciousness after brain injury remains relatively unclear. The first 12 months post ictus are widely reported as the period of greatest change, with an estimated 20% of persons with traumatic brain injury recovering consciousness. However, beyond 12 months post traumatic and 6 months post-nontraumatic injury the chances of further recovery are thought to diminish significantly. The aim of this study was to investigate the behavioural and psychosocial outcome of 12 patients with impaired consciousness 2 years post ictus. At the time of recruitment five of these patients met the diagnostic criteria defining the vegetative state and seven of these patients met the diagnostic criteria defining the minimally conscious state. Patients were assessed using the Wessex Head Injury Matrix at recruitment and again at least 2 years after initial contact. Functional and psychosocial outcome were also explored. Most patients showed some improvements to their behavioural portfolio, but all were still very dependent physically and all required a high level of support in their activities of daily living. None of the patients had emerged from their original condition, despite exhibiting larger behavioural portfolios. The implications of these findings for the management of patients in low awareness states are discussed.

This article is concerned with patients in coma, the vegetative, or minimally conscious states. Studies addressing the issue of assessment and management of these patients are described. These include (a) the development of an assessment tool (Wessex Head Injury Matrix, WHIM); (b) use of the WHIM to assess the effects of posture on arousal, showing that some 75% of patients show more behaviours when assessed while they are in a standing frame than when supine; (c) a comparison of the WHIM with the Glasgow Coma Scale, demonstrating that the WHIM is more sensitive than the GCS for measuring the behavioural repertoire of people in states of reduced consciousness; (d) a discussion of situations when neuro-imaging techniques are required to assess residual functioning; and (e) the long term outcome of one of the first vegetative patients to be scanned with Positron Emission Tomography (PET). We conclude with a discussion about neuropsychology and patients in states of impaired consciousness.

Subarachnoid hemorrhage (SAH) survivors often report psychosocial and emotional changes, including a diminished capacity for decision making. However, systematic investigations into the nature of the changes have been limited to those patients surviving SAH secondary to aneurysms of the anterior communicating artery. This study aimed to explore the nature of decision making in survivors of SAH secondary to aneurysms of the middle cerebral or posterior communicating artery using a series of computerized tasks. Twenty SAH survivors and 20 matched controls completed a battery of computerized decision-making tasks. These included tasks examining an individual's ability to make probabilistic choices and risk-taking behavior, as well as tasks examining aspects of impulsivity. The results revealed two key patterns of abnormal decision-making behavior in the SAH survivors: altered sensitivity to both reward and punishment, and impulsive responding. These complex deficits may contribute to difficulties in daily living resulting from apathy, poor judgment, or inhibition in SAH survivors. (JINS, 2006, 12, 697–706.)