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Blink rate in children with attention-deficit-hyperactivity disorder

  • Rochelle Caplan
    Correspondence
    Address reprint requests to Dr. R. Caplan, Neuropsychiatric Institute, R. 48-253B, 760 Westwood Plaza, Los Angeles, CA 90024.
    Affiliations
    Department of Psychiatry, University of California at Los Angeles, Los Angeles, California, USA
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  • Donald Guthrie
    Affiliations
    Departments of Psychiatry and Biostatistics and the Mental Retardation Research Center, University of California at Los Angeles, Los Angeles, California, USA
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  • Scott Komo
    Affiliations
    Department of Biostatistics, University of California at Los Angeles, Los Angeles, California, USA
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      This paper is only available as a PDF. To read, Please Download here.
      Spontaneous blink rate, a noninvasive measure of dopamine function, was coded in 28 children with attention-deficit-hyperactivity disorder (ADHD) and in 47 normal children during a listening, a conversation, and a verbal recall task. Unlike the normal children, the children with ADHD did not increase their blink rates significantly across these three tasks. The ADHD subjects who were not on stimulants had significantly lower blink rates than the normal children during verbal recall. The ADHD subjects on stimulants, however, had significantly higher blink rates than the normal subjects during the listening task. These preliminary findings are discussed in light of their potential implications for theories on neurotransmitter dysfunction and arousal in ADHD.

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