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The crossroads of anticipatory attention and motor preparation

Published online by Cambridge University Press:  18 September 2015

Samenvatting

In een drietal artikelen wordt de overeenkomst besproken tussen Processen die ten grondslag liggen aan twee verschillende functies: anticipatoire attentie en motorische preparatie. Beide functies zijn van belang voor een optimale afstemming op onze omgeving. Het achterste gedeelte van de hersenschors houdt zieh voornamelijk bezig met binnenkomende informatie uit de buiten-wereld en het eigen lichaam, terwijl het voorste deel essentieel is voor onze acties en readies. Als bekend is wanneer wij met relevante informatie worden geconfronteerd en vermoed kan worden hoe daarop moet worden gereageerd, worden modali-teitsspeeifieke sensorische en motorische kanalen geopend om zo een snelle en adequate reactie te garanderen. In deze tekst wordt gepostuleerd dat de achterste en voorste cortexhelften op vergelijkbare wijze vanuit de thalamus worden geactiveerd als onder-deel van anticipatoire attentie en motorische preparatie. Cruciaal is de inhiberende invloed die de nucleus reticularis (NR) uitoefent op de onderliggende thalamuskernen. De NR staat onder een dubbele controle: exciterend vanuit de prefrontale cortex en inhiberend vanuit het neostriatum. Aangegeven wordt hoe selectie in de informatieverwerking via deze balans kan worden gerealiseerd, zowel in het sensorische als het motorische domein. Nadat in Deel I een overzicht is gegeven van de relevante anatomische structuren, wordt hier het model voor anticipatoire attentie en motorische preparatie gepresenteerd. In het volgende artikel wordt neuropsychologische evidentie gepresenteerd, waarna het psychofysiologisch onderzoek aan de orde komt dat heeft geleid tot de formule ring van het model.

Type
Research Article
Copyright
Copyright © Scandinavian College of Neuropsychopharmacology 1997

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