Attention-deficit hyperactivity disorder causes

Jump to navigation Jump to search

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Charmaine Patel, M.D. [2], Haleigh Williams, B.S.

Attention-deficit hyperactivity disorder Microchapters

Home

Patient Information

Overview

Historical Perspective

Classification

Pathophysiology

Causes

Differentiating Attention-Deficit Hyperactivity Disorder from other Diseases

Epidemiology and Demographics

Risk Factors

Natural History, Complications and Prognosis

Diagnosis

Diagnostic Criteria

History and Symptoms

Psychiatric Examination

Laboratory Findings

Imaging Findings

Treatment

Medical Therapy

Psychotherapy

Brain Stimulation Therapy

Cost-Effectiveness of Therapy

Monitoring Response to Therapy

Future or Investigational Therapies

Case Studies

Case #1

Template:Attention-deficit hyperactivity disorder On the Web

Most recent articles

Most cited articles

Review articles

CME Programs

Powerpoint slides

Images

American Roentgen Ray Society Images of Attention-deficit hyperactivity disorder causes

All Images
X-rays
Echo & Ultrasound
CT Images
MRI

Ongoing Trials at Clinical Trials.gov

US National Guidelines Clearinghouse

NICE Guidance

FDA on Attention-deficit hyperactivity disorder causes

CDC on Attention-deficit hyperactivity disorder causes

Attention-deficit hyperactivity disorder causes in the news

Blogs on Attention-deficit hyperactivity disorder causes

Directions to Hospitals Treating Attention-deficit hyperactivity disorder

Risk calculators and risk factors for Attention-deficit hyperactivity disorder causes

Overview

There are no established causes of ADHD. Studies suggest that ADHD results from a complex interaction between genetic and environmental factors.[1]

Causes

There are no established causes of ADHD. ADHD likely results from an interaction between genetic factors and external factors, including trauma or exposure to toxins. The genetic component of the disease has been demonstrated by the increased likelihood that a person for whom ADHD runs in his/her family is more likely to have ADHD than a person with no family history of ADHD. Studies have also shown that there is a familial transmission of ADHD which does not occur through adoptive relationships. Twin studies indicate that the disorder is highly heritable and that genetics account for about three quarters of the total ADHD population, leaving the contribution of non-genetic factors at around 25%.[1]

A paper published in the Journal of Psychiatric Research in October 2015 identified a link between traumatic brain injury and the onset of ADHD-like symptoms in a sample of Canadian adults. Brain injury may be one possible cause of ADHD that is not related to genetics.[2]

References

  1. 1.0 1.1 OurMed. (2010). "Attention-deficit hyperactivity disorder."
  2. Ilie G, Vingilis ER, Mann RE, Hamilton H, Toplak M, Adlaf EM; et al. (2015). "The association between traumatic brain injury and ADHD in a Canadian adult sample". J Psychiatr Res. 69: 174–9. doi:10.1016/j.jpsychires.2015.08.004. PMID 26343610.


Template:WH Template:WS