Functional Evaluation in Patients With Urea Cycle Disorders (UCD) During a Driving Task

Inclusion Criteria:

* Individuals 16 to 40 years with molecular or biochemical confirmation of a urea cycle disorder.
* Healthy individuals will serve as an age and sex matched comparison group. Active driver's license for at least 6 months
* Read and understand English. as the tasks have not been validated in other languages
* IQ \>=70.

Exclusion Criteria:

* Skin disease that affects the scalp
* Past or present vascular disease
* Head trauma with loss of consciousness in the last year or evidence of cognitive impairment due to and persisting after head trauma
* Motor movement disorder which may cause excessive movement or impede use of the steering wheel and/or pedal
* Premature birth or birth before 32 weeks of gestation
* The participant is taking a stimulant or antidepressant
* Allergy to any component of the device, although expected to be rare
* History of psychosis
* Self-reported motion or cyber sickness
* Self-reported illicit substance use
* Vision disorder