The brain, which weighs only three pounds and is eighty percent water, is the key organ in our nervous system. It is divided into three different parts: the brain, the cerebellum and the medulla oblongata. The “gray matter” of the brain is about one-eighth of an inch thick and gives the brain its gray color. Inside the brain is the cortex, made up of billions of neurons. These neurons extend throughout the cerebral hemisphere and control all mental activity. In this report, I will discuss different brain disorders and how they affect the daily lives of people who may suffer from these disorders. (The Library Volume 900) The first disorder I'm going to talk about is a condition called attention deficit hyperactivity disorder (ADHD). This disease has not been discovered recently. It was first discovered in the 1800s by a British doctor, where the first book on attention deficit hyperactivity disorder was written, "Fidgety Phil." Until the 1960s, this was called minimal brain function. The drugs are also not a new treatment. In the 1930s, a drug called Dexedrine (d-amphetamine) or Desoxyn (methamphetamine), now known as Ritalin, was used. (Wender, MD 15) This disease is present in three to ten percent of school-age children and four to five percent of adults. ADHD is more common in boys than girls. To determine whether a child has ADHD, there are no established psychological or laboratory tests but testimonies from people involved in the patients' daily lives. However, certain criteria make it possible to define and diagnose the symptoms. In many cases, medications can reduce and to some extent eliminate ADHD. This is true in approximately seventy percent of school-age children with ADHD and in approximately sixty percent of adults receiving treatment. medicine. Another advantage of the drug is that it is not addictive if not abused. To reduce ADHD symptoms in adults, therapy may also be helpful. However, using medications to treat ADHD can be very controversial. (Wender, MD 9) Some characteristics of school-age children with ADHD are academic problems like math, reading, and spelling, as twenty to thirty percent of children have learning disabilities. The most common symptoms are difficulty paying attention, distractibility and hyperactivity. Not all ADHD patients are hyperactive, so a new diagnosis has been identified: attention deficit disorder (A.