This study is being done to understand how the brain works while people with urea cycle disorder (UCD) perform driving tasks that range from easy to difficult and to look at how that compares to traditional tests of thinking and attention.
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.
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