RT Journal Article SR Electronic T1 Awakenings from persistent vegetative state: report of three cases with parkinsonism and brain stem lesions on MRI JF Journal of Neurology, Neurosurgery & Psychiatry JO J Neurol Neurosurg Psychiatry FD BMJ Publishing Group Ltd SP 1571 OP 1573 DO 10.1136/jnnp.74.11.1571 VO 74 IS 11 A1 Matsuda, W A1 Matsumura, A A1 Komatsu, Y A1 Yanaka, K A1 Nose, T YR 2003 UL http://jnnp.bmj.com/content/74/11/1571.abstract AB Three patients with a persistent vegetative state after severe head injury are reported. They recovered from a prolonged disturbance of consciousness after the administration of levodopa. These patients all had parkinsonian features. On magnetic resonance imaging, the distribution of lesions implied a diffuse axonal injury involving the substantia nigra or ventral tegmental area. The existence of patients whose dopaminergic systems may have been selectively damaged by a severe head injury should be recognised because such individuals may respond to levodopa treatment.