An Introduction to Attention Deficit Hyperactivity Disorder (ADHD)

Almost all children have times when their behavior veers out of control. They may speed about in constant motion, make noise nonstop, refuse to wait their turn, and crash into everything around them. At other times they may drift as if in a daydream, failing to pay attention or finish what they start.

However, for some children, these kinds of behaviors are more than an occasional problem. Children with attention-deficit/hyperactivity disorder (ADHD) have behavior problems that are so frequent and/or severe that they interfere with their ability to live normal lives. These children often have trouble getting along with siblings and other children at school, at home, and in other settings. Those who have trouble paying attention usually have trouble learning. Some have an impulsive nature and this may put them in actual physical danger. Because children with ADHD have difficulty controlling their behavior, they may be labeled as “bad kids” or “space cadets.” Left untreated, more severe forms of ADHD can lead to serious, lifelong problems such as poor grades in school, run-ins with the law, failed relationships, substance abuse and the inability to keep a job.

What is ADHD?

ADHD is a condition of the brain that makes it difficult for children to control their behavior. It is one of the most common chronic conditions of childhood. It affects 4% to 12% of school-aged children. About 3 times more boys than girls are diagnosed with ADHD.

What are the symptoms of ADHD?

ADHD includes 3 behavior symptoms: inattention, hyperactivity, and impulsivity. A child with inattention symptoms may have the following behaviors:

A child with hyperactivity symptoms may have the following behaviors:

A child with impulsivity symptoms may have the following behaviors:

What is the difference between ADD vs. ADHD?

ADD stands for Attention Deficit Disorder. This is an old term that is now officially called Attention Deficit Hyperactivity Disorder, Inattentive Type. More on this will discussed below.

Are there different types of ADHD?

Children with ADHD may have one or more of the 3 main symptoms categories listed above. The symptoms usually are classified as the following types of ADHD:

  1. Inattentive type (formerly known as attention-deficit disorder [ADD])—Children with this form of ADHD are not overly active. Because they do not disrupt the classroom or other activities, their symptoms may not be noticed. Among girls with ADHD, this form is most common.
  2. Hyperactive/Impulsive type—Children with this type of ADHD show both hyperactive and impulsive behavior, but can pay attention.
  3. Combined Inattentive/Hyperactive/Impulsive type—Children with this type of ADHD show all 3 symptoms. This is the most common type of ADHD.

How can I tell if my child has ADHD?

Remember, it is normal for all children to show some of these symptoms from time to time. Your child may be reacting to stress at school or home. She may be bored or going through a difficult stage of life. It does not mean he or she has ADHD. Sometimes a teacher is the first to notice inattention, hyperactivity, and/or impulsivity and bring these symptoms to the parents’ attention. Sometimes questions from your pediatrician can raise the issue. Parents also may have concerns such as behavior problems at school, poor grades, difficulty finishing homework and so on. If your child is 6 years of age or older and has shown symptoms of ADHD on a regular basis for more than 6 months, discuss this with your pediatrician.

What causes ADHD?

ADHD is one of the most studied conditions of childhood but the cause of ADHD is still not clear at this time. The most popular current theory of ADHD is that ADHD represents a disorder of “executive function.” This implies dysfunction in the prefrontal lobes so that the child lacks the ability for behavioral inhibition or self-regulation of such executive functions as nonverbal working memory, speech internalization, affect, emotion, motivation, and arousal. It is believed that children with ADHD lack the right balance of neurotransmitters, which are specific chemicals in their brains, that help them to focus and inhibit impulses.

Because of this relative inability to inhibit, the child lives pretty much only in the “now” and lacks the ability to modify or delay behavior in view of future consequences. Since children with ADHD are often unaware of their behavior, they may become defiant and may even lie and claim, “I didn’t do it!”

Research to date has shown the following:

There is no significant evidence that ADHD is caused by the following:

Diagnosis

Your pediatrician will determine whether your child has ADHD using standard guidelines developed by the American Academy of Pediatrics. Unfortunately, there is no single test that can tell whether your child has ADHD. The diagnosis process requires several steps and involves gathering a lot of information from multiple sources. You, your child, your child’s school, and other caregivers should be involved in assessing your child’s behavior.

Generally, if your child has ADHD:

In addition to looking at your child’s behavior, your pediatrician will do a physical examination. A full medical history will be needed to put your child’s behavior in context and screen for other conditions that may affect your child’s behavior.

One of the challenges in diagnosing ADHD is that many disorders can look a lot like ADHD – including depression, anxiety, visual and hearing difficulties, seizures, learning disorders and even improper sleep quality. These conditions can show the same type of symptoms as ADHD. For example if your child has sleep apnea, a condition that involves disordered breathing during sleep, he may show signs of inattention and inability to focus that can sometimes be similar to a child with ADHD. Another example is a child that may have a learning disability. He/she may not pay attention in class due to inability to process that information and therefore be labeled with “inattention”. The same child may also be frustrated because he can’t process the material being taught in the classroom and therefore disturbs the classroom and acts as if he/she is “hyperactive.” In the case of this child with a learning disability, all the effort needs to be focused on the actual underlying problem, which again is the learning disability, and not on immediately trying to treat ADHD. Similarly, in our child with sleep apnea, parents need to address the sleeping problem first and not rush to place their child on medication for ADHD. As you will read below, it is possible to have ADHD with other conditions, so children who do have sleep apnea or learning disabilities MAY ALSO have ADHD and may eventually require treatment for both conditions.

The diagnosis of ADHD takes time, and the evaluation process usually takes at least 2-3 visits before the diagnosis can be made. Occasionally the process can take longer if referrals to psychologists or psychiatrists are warranted. Blood tests may or may not be indicated, and this will be discussed during your visit.

Coexisting conditions

Many children who have been diagnosed with ADHD have at least 1 coexisting condition. Common coexisting conditions include the following:

Treatment

Once the diagnosis is confirmed, the outlook for most children who receive treatment for ADHD is very encouraging. There is no specific cure for ADHD, but there are many treatment options available. Each child’s treatment must be tailored to meet individual needs. In most cases, treatment for ADHD could include the following: