Insomnia, or sleep disturbances, arising out of ADHD's impulsivity could be the reason why adults with ADHD symptoms experience a reduced quality of life, according to a new study.

Usually diagnosed during childhood and teenage, attention deficit hyperactivity disorder (ADHD) is marked with restlessness, hyperactivity, and short attention spans.

It is the neuro-developmental disorder linked with a delayed maturing of prefrontal cortex of the brain, which is crucial for attention and focus.