There is no consensus on the rate of return to work in brain-injured patients, and it is estimated that the rate of long-term and sustained return to work after brain injury is around 30%. In general, the severity of the brain injury determines whether or not a person with brain injury can return to work, although there are reports of patients with severe traumatic brain injury achieving sustained work. Studies have shown that headache, impaired vision, pain syndrome, dizziness, postural instability, heterotopic ossification, hypertonia, epilepsy, impaired fine motor skills, insomnia, and fatigue are the main causes of failure to return to work after traumatic brain injury.