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Titolo:
Abnormal early stages of task stimulus processing in children with attention-deficit hyperactivity disorder - evidence from event-related gamma oscillations
Autore:
Yordanova, J; Banaschewski, T; Kolev, V; Woerner, W; Rothenberger, A;
Indirizzi:
Bulgarian Acad Sci, Inst Physiol, Sofia 1113, Bulgaria Bulgarian Acad SciSofia Bulgaria 1113 nst Physiol, Sofia 1113, Bulgaria Univ Gottingen, D-37075 Gottingen, Germany Univ Gottingen Gottingen Germany D-37075 gen, D-37075 Gottingen, Germany
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 6, volume: 112, anno: 2001,
pagine: 1096 - 1108
SICI:
1388-2457(200106)112:6<1096:AESOTS>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
SINGLE-SWEEP ANALYSIS; VISUAL-SPATIAL ATTENTION; TRANSIENT 40-HZ RESPONSE; TIME-FREQUENCY ANALYSIS; DEVELOPMENTAL-CHANGES; BAND ACTIVITY; TIC DISORDER; DEFICIT/HYPERACTIVITY DISORDER; NEURONAL OSCILLATIONS; SENSORIMOTOR CORTEX;
Keywords:
gamma band response; attention-deficit hyperactivity disorder; phase-locking; selective attention; sensory-motor integration; event-related potentials; electroencephalography;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
94
Recensione:
Indirizzi per estratti:
Indirizzo: Rothenberger, A Bulgarian Acad Sci, Inst Physiol, Acad G Bonchev Str Bl 23, Sofia 1113, Bulgaria Bulgarian Acad Sci Acad G Bonchev Str Bl 23 Sofia Bulgaria 1113
Citazione:
J. Yordanova et al., "Abnormal early stages of task stimulus processing in children with attention-deficit hyperactivity disorder - evidence from event-related gamma oscillations", CLIN NEU, 112(6), 2001, pp. 1096-1108

Abstract

Objectives: Attention-related differences in early stages of stimulus processing were assessed in healthy controls and children with attention-deficit hyperactivity disorder (ADHD) by analyzing phase-locked gamma band (31-63Hz) responses to auditory stimuli in a selective-attention task. Methods: A total of 28 children aged 9-12 years (ADHD and matched healthy controls) pressed a button in response to each target stimulus presented atthe attended side (right or left). Auditory gamma band responses (GBRs) within 0-120 ms were analyzed at 8 electrodes with wavelet transform. Effectsof attended channel, stimulus type. and group were evaluated for GBR powerand phase-locking. Results: For both groups. GBRs had a frontal-central distribution, were significantly larger and more strongly phase-locked to target than to non-target stimuli. and did not differentiate the attended from the unattended channel. ADHD children produced larger and more strongly phase-locked GBRs than controls only to right-side stimuli, irrespective of whether these were the attended or the ignored stimuli. Conclusions: The association between auditory GBR and motor task stimulus in children suggests that phase-locked gamma oscillations may reflect processes of sensory-motor integration. ADHD-related deviations of GBRs indicatethat early mechanisms of auditory stimulus processing are altered in ADHD.presumably as a result of impaired motor inhibition. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 22/01/20 alle ore 07:05:59