Verbal instructions and top-down saccade control.

Mosimann, U. P.; Felblinger, J.; Colloby, S. J.; Müri, R. M. (2004). Verbal instructions and top-down saccade control. Experimental brain research, 159(2), pp. 263-267. Springer-Verlag; http://www.springer.de 10.1007/s00221-004-2086-8

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Few studies have addressed the interaction between instruction content and saccadic eye movement control. To assess the impact of instructions on top-down control, we instructed 20 healthy volunteers to deliberately delay saccade triggering, to make inaccurate saccades or to redirect saccades--i.e. to glimpse towards and then immediately opposite to the target. Regular pro- and antisaccade tasks were used for comparison. Bottom-up visual input remained unchanged and was a gap paradigm for all instructions. In the inaccuracy and delay tasks, both latencies and accuracies were detrimentally impaired by either type of instruction and the variability of latency and accuracy was increased. The intersaccadic interval (ISI) required to correct erroneous antisaccades was shorter than the ISI for instructed direction changes in the redirection task. The word-by-word instruction content interferes with top-down saccade control. Top-down control is a time consuming process, which may override bottom-up processing only during a limited time period. It is questionable whether parallel processing is possible in top-down control, since the long ISI for instructed direction changes suggests sequential planning.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Pre-clinic Human Medicine > BioMedical Research (DBMR) > Forschungsbereich Pavillon 52 > Forschungsgruppe Perzeption und Okulomotorik
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology

UniBE Contributor:

Müri, René Martin

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0014-4819

Publisher:

Springer-Verlag; http://www.springer.de

Language:

English

Submitter:

Pascal Wurtz

Date Deposited:

18 Jul 2014 10:40

Last Modified:

23 Oct 2019 19:16

Publisher DOI:

10.1007/s00221-004-2086-8

PubMed ID:

15549281

BORIS DOI:

10.7892/boris.43036

URI:

https://boris.unibe.ch/id/eprint/43036

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