Stroke is classified into ischemic stroke and hemorrhagic stroke. If symptoms of a stroke occur, such as slurred speech, limb weakness, or other neurological deficits, one should immediately seek medical attention at the emergency department of a local hospital. Emergency doctors will perform a head CT scan. If ischemia is present, the CT scan might not show changes within 24 hours, in which case a visit to the neurology department is necessary. If hemorrhage is detected, then a visit to the neurosurgery department is required. However, if the symptoms are of a chronic, old stroke, then a visit to the neurology department is needed.