# What is Attention Deficit Hyperactivity Disorder?

Attention Deficit Hyperactivity Disorder is a neurobehavioral disorder that is expressed in inattention, hyperactivity/impulsivity or even a combination of both.

Some of the [Attention Deficit Hyperactivity Disorder symptoms](https://tomatis.com.au/who-do-we-help/adhd-add-impacts-causes-solution) are -

- Being unable to sit still, especially in calm or quiet surroundings.
- Constantly fidgeting.
- Being unable to concentrate on tasks.
- Excessive physical movement.
- Excessive talking.
- Being unable to wait their turn.
- Acting without thinking.
- Interrupting conversations.