What is ADHD? Learn more about ADHD and check out some related resources.


Disclaimer: This is not a replacement for medical advice, we are not doctors. We created DiverseNeuro solely for educational and awareness purposes. If you require medical attention, please go to your healthcare provider or in an emergency call 911.

ADHD is known as a neurodevelopmental disorder that affects one’s ability to perform concentration-based tasks. ADHD also known as Attention Hyper Deficit Activity Disorder affects one's ability to regulate their attention span.
To help narrow down common ADHD characteristics, doctors differentiate ADHD between three main subtype categories.

Three main types of ADHD are known as Inattentive, Hyperactivity/Impulsivity and the combined type.

The Inattentive Type
- Often associated with having poor organization skills
- Difficulty adhering to details.

The Hyperactive Type
- Cannot sit still (Often leaves seat during designated times of sitting)
- Lacks Patience

The Combined Type
- Doctors will diagnose patients with the combined type if they exhibit 6 of the 9 total symptoms under the two main subtypes.

Neurotransmitters and ADHD

Norepinephrine is known as an organic chemical in the catecholamine family that functions in the brain and body as a hormone and neurotransmitter. Norepinephrine (NE) is a neurochemical that is related to dopamine. Lower than normal levels of norepinephrine in ADHD brains are found to create difficulty with focusing, processing, and controlling impulsive behaviours.


Dopamine (DA) is a neurochemical that directly corresponds with our perception of pleasure and reward. Dopamine helps motivate us as the brain perceives rewards linked to our success and survival. Those with ADHD appear to have low levels of dopamine which adhere to many ADHD symptoms.


People with ADHD may not show obvious symptoms till adulthood, where their behaviours suffer among the general public. Many think ADHD will also disappear in adulthood; the hyperactivity may disappear alongside puberty, and some patients will continue to have these symptoms in their adult years. However, in most cases, the attentional deficits remain throughout a patient’s entire lifespan.


One of the greatest misconceptions of ADHD is “People with ADHD cannot focus”, this is incorrect as those with ADHD can focus to a certain extent. Those who have ADHD have issues regarding the regulation of attention, therefore often resulting in a lower attention span.

Boys are more commonly diagnosed with ADHD when in comparison to girls. This accusation is justified as girls mainly fall under the inattentive type. Girls show symptoms differently, and may not appear to stand apart from the crowd.