A 35-year-old right-handed man was admitted to the rehabilitation unit, 4 weeks after a traumatic brain injury. He had been found unconscious in the street several hours after drinking with friends. On first admission to the emergency unit, his Glasgow Coma Scale score was 6 out of 15. His CT scan of head showed an occipital condyle fracture, an acute right subdural haematoma, bifrontal intraparenchymal and subarachnoid haemorrhage, and right hemisphere oedema. A few hours following intensive care unit admission, he developed a right reactive mydriasis. His intracranial pressure remained high despite osmotherapy, and he underwent decompressive craniectomy with subdural …