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Het raakvlak van anticipatoire attentie en motorische preparatie Deel III

Published online by Cambridge University Press:  16 January 2019

C.H.M. Brunia
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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 belong voor een optimale afstemming op onze omgeving. Het achterste gedeelte van de hersenschors houdt zich voornamelijk bezig met binnenkomende informatie uit de buitenwereld en het eigen lichaam, terwijl het voorste deel essentieel is voor onze acties en reacties. Als bekend is wanneer wij met relevante informatie warden geconfronteerd en vermoed kan worden hoe daarop moet worden gereageerd, worden modaliteitsspecifieke 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 onderdeel van motorische preparatie en anticipatoire attentie. 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. Na het overzicht van de relevante anatomische structural in deel I, de presentatie van het model in deel II, komt in het ilenle artikel neuropsychologische evidentie aan de orde, waarna het psychofysiologisch onderzoek besproken wordt, dat geleid heeft tot de formulering van het model.

Summary

Summary

This series of papers suggests that processes underlying anticipatory attention and motor preparation share a common control mechanism. Both functions are of utmost importance for an optimal adaptation to our environment. While the posterior part of the cortex is aimed at the analysis of incoming information, both from the outer world and our own body, the anterior part is involved in action and reaction. If we know when in the near future we will be confronted with relevant information, and how this has to be responded upon, modality specific sensoric and motoric information channels have to be open in order to guarantee an adequate response. The anterior and posterior parts of the cortex are activated from the thalamus and the information transmission is influenced via the reticular nucleus (RN) of the thalamus. The RN itself is under a double control: excitatory from the prefrontal cortex and inhibitory from the neostriatum. It is suggested that selection in anticipatory attention and motor preparation is realized in a comparable way via the RN. Following the description of the relevant anatomical structures in Part I, and the presentation of the model in Part II, we wilt discuss now the supporting neuropsychological evidence. Next the psychophysiological experiments will be described that have lead to the formulation of the model.

Keywords

Preparatieanticipatieattentiemotoriekneuropsychologiepsychofysiologienucleus reticularis thalamiinputmodulatiePreparationanticipationattentionmotor systemneuropsxchologypsychophysiologynucleus reticularis thalamiinputmodulation
Type
Research Article
Information
Acta Neuropsychiatrica , Volume 10 , Issue 1 , March 1998 , pp. 13 - 18
Copyright
Copyright © Cambridge University Press 1998

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