title: [Syndrome of attention deficit with hyperactivity as the expression of an organic functional disorder].
abstract: BACKGROUND
  The diagnosis of ADHD can be determined reliably from the clinical history, but the causes and pathophysiology of the disorder remain unclear.
  
  
  CONCLUSIONS
  Recent findings using magnetic resonance imaging, and imaging with PET and SPECT, as well as studies that probe brain functioning through transcranial magnetic stimulation suggest that circuits linking prefrontal cortex, striatum, and cerebellum are not functioning normally in ADHD.
authors.affiliation: Child Study Center, NYU School of Medicine, New York, NY 10016, USA. francisco.castellanos@med.nyu.edu
authors.forename: F X
authors.initials: FX
authors.lastname: Castellanos
authors.forename: M T
authors.initials: MT
authors.lastname: Acosta
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000175:diagnosis / Q000503:physiopathology*; D001921:Brain / Q000503:physiopathology*; D001923:Brain Chemistry; D004569:Electroencephalography; D005071:Evoked Potentials; D006801:Humans; D008279:Magnetic Resonance Imaging; D008954:Models, Biological; D014055:Tomography, Emission-Computed; D014057:Tomography, X-Ray Computed