Specific task anticipation versus unspecific orienting reaction during early contingent negative variation

• Verfasst von: Bender, Stephan [VerfasserIn]
• Verfasst von: Resch, Franz [VerfasserIn]
• Verfasst von: Weisbrod, Matthias [VerfasserIn]
• Verfasst von: Oelkers-Ax, Rieke [VerfasserIn]
• Titel: Specific task anticipation versus unspecific orienting reaction during early contingent negative variation
• Verf.angabe: Stephan Bender, Franz Resch, Matthias Weisbrod, Rieke Oelkers-Ax
• E-Jahr: 2004
• Jahr: 10 May 2004
• Umfang: 10 S.
• Fussnoten: Gesehen am 22.12.2021
• Titel Quelle: Enthalten in: Clinical neurophysiology
• Ort Quelle: Amsterdam [u.a.] : Elsevier Science, 1999
• Jahr Quelle: 2004
• Band/Heft Quelle: 115(2004), 8, Seite 1836-1845
• ISSN Quelle: 1872-8952
• DOI: doi:10.1016/j.clinph.2004.03.023
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Adolescence
• Sach-SW: Childhood
• Sach-SW: Contingent negative variation
• Sach-SW: Event-related desynchronization
• Sach-SW: Movement preparation
• Sach-SW: Orienting reaction
• K10plus-PPN: 1783517743

Abstract

Objective: To investigate whether a warning stimulus in a forewarned reaction time task elicits only an unspecific orienting reaction or task specific motor cortex activity. Methods: We examined the time-course of alpha event-related desynchronization (ERD) as an indicator for primary motor cortex activation in an auditory contingent negative variation (CNV) paradigm with an interstimulus interval of 3 s in healthy subjects between 6 and 18 years using a 64 channel high-density sensor array. Results: We replicated a wide frontal distribution for the initial CNV component (iCNV), while only during late CNV (lCNV) a centro-parietal negativity resembling the ‘Bereitschaftspotential’ occurred. However, an early alpha-ERD over the central area contralateral to the side of the response movement followed the imperative stimulus already during the iCNV-interval. This early alpha-ERD was highly significantly lateralised and was even more prominent during iCNV than during lCNV indicating an activation of the contralateral sensorimotor cortex already during iCNV. Conclusions: We conclude that early task specific preparatory motor processes (which might reflect the retrieval of a motor program from memory) were elicited by the warning stimulus. These preparatory processes clearly exceeded an unspecific orienting reaction as early alpha-ERD was influenced by the side of the anticipated movement.