Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude
Fixations consist of small movements including microsaccades, i.e., rapid flicks in eye position that replace the retinal image by up to 1 degree of visual angle. Recently, we showed in a delayed-saccade task (1) that the rate of microsaccades decreased in the course of saccade preparation and (2) t...
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| Language: | English |
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MDPI AG
2008-09-01
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| Series: | Journal of Eye Movement Research |
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| Online Access: | https://bop.unibe.ch/JEMR/article/view/2241 |
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| author | Martin Rolfs Jochen Laubrock Reinhold Kliegl |
| author_facet | Martin Rolfs Jochen Laubrock Reinhold Kliegl |
| author_sort | Martin Rolfs |
| collection | DOAJ |
| description | Fixations consist of small movements including microsaccades, i.e., rapid flicks in eye position that replace the retinal image by up to 1 degree of visual angle. Recently, we showed in a delayed-saccade task (1) that the rate of microsaccades decreased in the course of saccade preparation and (2) that microsaccades occurring around the time of a go signal were associated with prolonged saccade latencies (Rolfs et al., 2006). A re-analysis of the same data set revealed a strong dependence of these findings on microsaccade amplitude. First, microsaccade amplitude dropped to a minimum just before the generation of a saccade. Second, the delay of response saccades was a function of microsaccade amplitude: Microsaccades with larger amplitudes were followed by longer response latencies. These finding were predicted by a recently proposed model that attributes microsaccade generation to fixation-related activity in a saccadic motor map that is in competition with the generation of large saccades (Rolfs et al., 2008). We propose, therefore, that microsaccade statistics provide a behavioral correlate of fixation-related activity in the oculomotor system. |
| format | Article |
| id | doaj-art-f1517c843a7a468fa1dec28f6c21f8af |
| institution | Kabale University |
| issn | 1995-8692 |
| language | English |
| publishDate | 2008-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-f1517c843a7a468fa1dec28f6c21f8af2025-08-20T03:48:41ZengMDPI AGJournal of Eye Movement Research1995-86922008-09-011310.16910/jemr.1.3.1Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitudeMartin Rolfs0Jochen Laubrock1Reinhold Kliegl2University of PotsdamUniversity of PotsdamUniversity of PotsdamFixations consist of small movements including microsaccades, i.e., rapid flicks in eye position that replace the retinal image by up to 1 degree of visual angle. Recently, we showed in a delayed-saccade task (1) that the rate of microsaccades decreased in the course of saccade preparation and (2) that microsaccades occurring around the time of a go signal were associated with prolonged saccade latencies (Rolfs et al., 2006). A re-analysis of the same data set revealed a strong dependence of these findings on microsaccade amplitude. First, microsaccade amplitude dropped to a minimum just before the generation of a saccade. Second, the delay of response saccades was a function of microsaccade amplitude: Microsaccades with larger amplitudes were followed by longer response latencies. These finding were predicted by a recently proposed model that attributes microsaccade generation to fixation-related activity in a saccadic motor map that is in competition with the generation of large saccades (Rolfs et al., 2008). We propose, therefore, that microsaccade statistics provide a behavioral correlate of fixation-related activity in the oculomotor system.https://bop.unibe.ch/JEMR/article/view/2241fixational eye movementssaccade latencysaccade generationsuperior colliculus |
| spellingShingle | Martin Rolfs Jochen Laubrock Reinhold Kliegl Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude Journal of Eye Movement Research fixational eye movements saccade latency saccade generation superior colliculus |
| title | Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude |
| title_full | Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude |
| title_fullStr | Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude |
| title_full_unstemmed | Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude |
| title_short | Microsaccade-induced prolongation of saccade latencies depends on microsaccade amplitude |
| title_sort | microsaccade induced prolongation of saccade latencies depends on microsaccade amplitude |
| topic | fixational eye movements saccade latency saccade generation superior colliculus |
| url | https://bop.unibe.ch/JEMR/article/view/2241 |
| work_keys_str_mv | AT martinrolfs microsaccadeinducedprolongationofsaccadelatenciesdependsonmicrosaccadeamplitude AT jochenlaubrock microsaccadeinducedprolongationofsaccadelatenciesdependsonmicrosaccadeamplitude AT reinholdkliegl microsaccadeinducedprolongationofsaccadelatenciesdependsonmicrosaccadeamplitude |