Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and otherwise age-inappropriate.
Developmental disorders comprise a group of psychiatric conditions originating in childhood that involve serious impairment in different areas. There are several ways of using this term. The most narrow concept is used in the category "Specific Disorders of Psychological Development" in the ICD-10. These disorders comprise developmental language disorder, learning disorders, motor disorders, and autism spectrum disorders. In broader definitions ADHD is included, and the term used is neurodevelopmental disorders. Yet others include antisocial behavior and schizophrenia that begins in childhood and continues through life. However, these two latter conditions are not as stable as the other developmental disorders, and there is not the same evidence of a shared genetic liability.
Hyperfocus is an intense form of mental concentration or visualization that focuses consciousness on a subject, topic, or task. In some individuals, various subjects or topics may also include daydreams, concepts, fiction, the imagination, and other objects of the mind. Hyperfocus on a certain subject can cause side-tracking away from assigned or important tasks.
Adult Attention Deficit Hyperactivity Disorder is the persistence of attention deficit hyperactivity disorder (ADHD) in adults. It is a neurodevelopmental disorder, meaning symptoms must have been present in childhood except for when ADHD occurs after traumatic brain injury. Specifically, for ADHD, multiple symptoms must have been present before the age of 12, according to DSM-5 diagnostic criteria. This cutoff age of 12 is a change from the previous requirement of symptom onset before the age of 7 in the DSM-IV to add flexibility in the diagnosis of adults. ADHD was previously thought to be a childhood disorder that improved with age, but recent research has disproved this. Approximately two-thirds of childhood cases of ADHD continue into adulthood, with varying degrees of symptom severity that change over time, and continue to significantly affect individuals' daily functioning in multiple domains.
Nonverbal learning disability (NVLD) is a proposed category of neurodevelopmental disorder characterized by core deficits in visual-spatial processing and a significant discrepancy between verbal and nonverbal intelligence. A review of papers found that proposed diagnostic criteria were inconsistent. Proposed additional diagnostic criteria include intact verbal intelligence, and deficits in the following: visuoconstruction abilities, speech prosody, fine-motor coordination, mathematical reasoning, visuospatial memory and social skills. NVLD is not recognised by the DSM-5 and is not clinically distinct from learning disorder.
Cognitive disengagement syndrome (CDS) is an attention syndrome characterised by prominent dreaminess, mental fogginess, hypoactivity, sluggishness, slow reaction time, staring frequently, inconsistent alertness, and a slow working speed.
Russell Alan Barkley is an American retired clinical neuropsychologist who was a clinical professor of psychiatry at the VCU Medical Center until 2022 and an author of books on attention-deficit hyperactivity disorder (ADHD). Involved in research since 1973 and a licensed psychologist since 1977, he is an expert on ADHD and has devoted much of his scientific career to studying ADHD and related fields like childhood defiance. He proposed to change the name of sluggish cognitive tempo (SCT) to concentration deficit disorder (CDD) and later cognitive disengagement syndrome (CDS).
Attention deficit hyperactivity disorder predominantly inattentive, is one of the three presentations of attention deficit hyperactivity disorder (ADHD). In 1987–1994, there were no subtypes and thus it was not distinguished from hyperactive ADHD in the Diagnostic and Statistical Manual (DSM-III-R).
Despite the scientifically well-established nature of attention deficit hyperactivity disorder (ADHD), its diagnosis, and its treatment, each of these has been controversial since the 1970s. The controversies involve clinicians, teachers, policymakers, parents, and the media. Positions range from the view that ADHD is within the normal range of behavior to the hypothesis that ADHD is a genetic condition. Other areas of controversy include the use of stimulant medications in children, the method of diagnosis, and the possibility of overdiagnosis. In 2009, the National Institute for Health and Care Excellence, while acknowledging the controversy, stated that the current treatments and methods of diagnosis are based on the dominant view of the academic literature.
Edward McKey Hallowell is an American psychiatrist, speaker, New York Times best-selling author and podcast host. He specializes in ADHD and is the founder of the Hallowell ADHD Centers. Hallowell is the author of 20 books, including the Distraction series, co-authored with Dr. John Ratey.
F. Xavier Castellanos is a Bolivian nueroscientist who is the director of research at the NYU Child Study Center. His work aims at elucidating the neuroscience of ADHD through structural and functional brain imaging studies, collaborating on molecular genetic studies, and coordinating an interdisciplinary network of translational investigators. Dr. Castellanos chaired the NIH ‘Initial Review Group’ on Developmental Psychopathology and Developmental Disabilities from 2005–2007 and is chairing the revision of the diagnostic criteria for externalizing disorders for the forthcoming edition of DSM-V, projected for 2012. He continues to make significant contributions to research into the neurobiological substrates of attention deficit hyperactivity disorder.
Joseph Biederman was Chief of the Clinical and Research Programs in Pediatric Psychopharmacology and Adult ADHD at the Massachusetts General Hospital and a professor of psychiatry at Harvard Medical School. Biederman was board-certified in general and child psychiatry.
Susan Smalley is an American behavioral geneticist, writer and activist. The co-author of Fully Present: The Science, Art, and Practice of Mindfulness, she is the founder of the UCLA Mindful Awareness Research Center at the Jane and Terry Semel Institute for Neuroscience and Human Behavior (MARC), and professor emerita in the department of psychiatry and biobehavioral sciences at UCLA. Her research centers on the genetic basis of childhood-onset behavior disorders, such as ADHD, and the cognitive and emotional impact of mindfulness meditation on health and wellbeing. She has published more than 100 peer-reviewed papers and lectured globally on the genetics of human behavior and the science of mindfulness.
Hyperactivity has long been part of the human condition, although hyperactive behaviour has not always been seen as problematic.
Ernest "Mark" Mahone is an American pediatric neuropsychologist.
Attention-Deficit/Hyperactivity Disorder (ADHD) is a neurodevelopmental disorder characterized by difficulty focusing attention, hyperactivity, and impulsive behavior. Treatments generally involve behavioral therapy and/or medications. ADHD is estimated to affect about 6 to 7 percent of people aged 18 and under when diagnosed via the DSM-IV criteria. When diagnosed via the ICD-10 criteria, hyperkinetic disorder gives rates between 1 and 2 percent in this age group.
The ADHD Rating Scale (ADHD-RS) is a parent-report or teacher-report inventory created by George J. DuPaul, Thomas J. Power, Arthur D. Anastopoulos, and Robert Reid consisting of 18–90 questions regarding a child's behavior over the past 6 months. The ADHD Rating Scale is used to aid in the diagnosis of attention deficit hyperactivity disorder (ADHD) in children ranging from ages 5–17.
The Gateway School is an independent school on the Upper West Side of Manhattan serving children ages 5–14 with learning disabilities. It currently enrolls approximately 180 students.
Stephen P. Hinshaw is an American psychologist whose contributions lie in the areas of developmental psychopathology and combating the stigma that surrounds mental illness. He has authored more than 325 scientific articles and chapters as well as 14 authored and edited books. Currently, he is Professor in the Department of Psychology at the University of California, Berkeley, and Professor In Residence and Vice Chair for Child and Adolescent Psychology in the Department of Psychiatry at the University of California, San Francisco. His work focuses on child and adolescent mental disorders, clinical interventions, mechanisms of change in psychopathology, and stigma prevention efforts, with a specialization in ADHD and other externalizing behavioral disorders.
Jan K. Buitelaar is a Dutch medical doctor, psychiatrist, author, and academic. He is a professor of psychiatry and child and adolescent psychiatry at Radboud University Medical Centre and former Head of Child and Adolescent Psychiatry at Karakter Child and Adolescent Psychiatry.
