The National Hospital for Neurology and Neurosurgery (NHNN), Queen Square, is the UK's largest dedicated neurological and neurosurgical hospital. Celebrating 150 years this year, it provides comprehensive services for the diagnosis, treatment and care of all conditions that affect the brain, spinal cord, peripheral nervous system and muscles. Services include specialist neurosurgery, a brain tumour unit, the Hyper-acute Stroke Unit (HASU), an acute brain injury unit, the National Prion Clinic, a pioneering neuro-rehabilitation unit, the UK's first interventional MRI scanner, the largest specialised neurosurgical ITU and the only neuromedical ITU in the country. Together with its neighbour, the Institute of Neurology, it is a major international centre for research and training.