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Study Finds Biomarker Differentiating the Inattentive, Combined Subtypes of ADHD

Thursday, October 17, 2013
Oct. 8, 2013 - Using a common test of brain functioning, researchers have found differences in the brains of adolescents with the inattentive and combined hyperactivity and impulsivity subtypes of attention-deficit/hyperactivity disorder (ADHD). Recently published in the journal Biological Psychiatry, this brain wave test using electroencephalograms (EEGs) may offer a potential biomarker for differentiating the two types of this disorder.The alpha wave patterns of teens with the inattentive type did not process the important information in the visual cues, limiting their ability to succeed. By contrast, the subjects' beta waves, which are associated with the performance of motor tasks were most deficient in teens with the combined type, suggesting they had greatest difficulty accomplishing the motor task -- pressing a button. According to Dr Levinson, these advances in better diagnosing ADHD and its subtypes objectively vs utilizing lists of symptoms are helping us really understand this major disorder that some still mistakenly dispute exists. Although the abnormal signal findings are detected within the cerebral cortex via EEGs, Levinson's research suggests that the primary impairment lies where the scrambled signals originate-the cerebellar- vestibular system, not necessarily where they wind up and secondarily trigger higher mental dysfunctiong. This concept would better explain the presence of only inner-ear neurological signs in ADHD as well as the coexistence of other comorbiddisorders of cerebellar-vestibular origin, eg. dyslexia or LD, dyscalculia, dysgraphia, dyspraxia,phobias, etc.

About Harold Levinson, M.D.

Formerly Clinical Associate Professor of Psychiatry at New York University Medical Center, Dr. Harold Levinson is currently Director of the Levinson Medical Center for Learning Disabilities in Great Neck, New York. He is a well known neuropsychiatrist, clinical researcher and author. His "highly original" research into the cerebellar-vestibular (inner-ear) origins and treatment of dyslexia and related learning, attention-deficit/hyperactivity and anxiety or phobic disorders has evolved over the past four decades. Levinson's concepts encompass the collective insights derived from the examinations, follow-up and successful treatment of over 35,000 children, adults and even seniors and have led to new methods of screening, diagnosis, treatment and prevention. His expanded theories appear capable of encompassing and/or explaining all reported symptoms as well as most other concepts and experimental data, thus resulting in a truly holistic perspective.

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