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A request that this article title be changed to ADHD is under discussion. Please do not move this article until the discussion is closed. Medical condition Attention deficit hyperactivity disorder Other names Formerly: Attention deficit disorder (ADD), hyperkinetic disorder (HD) ADHD arises from maldevelopment in brain regions such as the prefrontal cortex, basal ganglia and anterior cingulate ...
Large, high quality research has found small differences in the brain between ADHD and non-ADHD patients. [1] [15] Jonathan Leo and David Cohen, critics who reject the characterization of ADHD as a disorder, contended in 2003 and 2004 that the controls for stimulant medication usage were inadequate in some lobar volumetric studies, which makes it impossible to determine whether ADHD itself or ...
There is no single, unified theory that explains the cause of ADHD. Genetic factors are presumed important, and it has been suggested that environmental factors may affect how symptoms manifest. [20] [35] It is becoming increasingly accepted that individuals with ADHD have difficulty with "executive functioning". In higher organisms, such as ...
Sensory overload occurs when one or more of the body's senses experiences over-stimulation from the environment. There are many environmental elements that affect an individual. Examples of these elements are urbanization, crowding, noise, mass media, and technology. [1] [2] [3] [4]
The scientific study of the causes of developmental disorders involves many theories. Some of the major differences between these theories involves whether environment disrupts normal development, if abnormalities are pre-determined, or if they are products of human evolutionary history which become disorders in modern environments (see evolutionary psychiatry). [5]
The hypothesis notes that humans spent most of their evolutionary history in hunter-gatherer societies, and it argues that ADHD represents a lack of adaptation to farming societies. Hartmann first developed the idea as a mental model after his own son was diagnosed with ADHD, stating, "It's not hard science, and was never intended to be." [1]
This hypothesis gained greater support following a 2015 neuroimaging study comparing ADHD inattentive symptoms and CDS symptoms in adolescents: It found that CDS was associated with a decreased activity in the left superior parietal lobule (SPL), whereas inattentive symptoms were associated with other differences in activation. [39]
A person can have ADHD but not learning disabilities or have learning disabilities without having ADHD. The conditions can co-occur. [106] People diagnosed with ADHD sometimes have impaired learning. Some of the struggles people with ADHD have might include lack of motivation, high levels of anxiety, and the inability to process information. [107]
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