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Intensity Dependence of Auditory Evoked Potentials (IDAP) in Adult Attention Deficit/Hyperactivity (ADHD) Disorder
Ist Teil von
Journal of psychophysiology, 2014-01, Vol.28 (2), p.63-72
Ort / Verlag
Hogrefe Publishing
Erscheinungsjahr
2014
Quelle
PsycARTICLES
Beschreibungen/Notizen
Intensity-dependent auditory evoked potentials (IDAP) were shown to be increased
in highly impulsive individuals. As impulsivity is one of the core symptoms of
attention deficit/hyperactivity disorder (ADHD), patients with ADHD were
expected to exhibit an enhanced IDAP. Twenty-five ADHD patients taking
methylphenidate and 21 healthy control participants were given diagnostic
questionnaires including the Barratt Impulsivity Scale and IDAP was assessed
with five-tone intensities. Amplitude, latency, and intensity slope of the N1,
P2, and N1/P2 were determined. Contrary to our hypothesis, there was no
significant group difference with regard to N1 amplitude and ADHD patients
exhibited significantly lower P2 amplitude at high intensity and a flatter
N1/P2 slope of the stimulus intensity function than healthy controls.
Motor impulsivity, a subscale of the Barratt impulsivity scale, showed a
significantly negative correlation with P2 amplitude within the ADHD group. The
unexpected results could be due to the effect of methylphenidate.