Eye position effects in saccadic adaptation in macaque monkeys
| Autor: | Katharina Havermann, Annalisa Bosco, Giacomo Placenti, Svenja Wulff, Markus Lappe, Patrizia Fattori |
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| Přispěvatelé: | Wulff S., Bosco A., Havermann K., Placenti G., Fattori P., Lappe M. |
| Rok vydání: | 2012 |
| Předmět: |
Physiology
Normal Distribution Fixation Ocular Macaque 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine biology.animal mental disorders Saccades Animals 0501 psychology and cognitive sciences Communication biology Adaptation Ocular business.industry General Neuroscience 05 social sciences Saccadic masking Eye position Oculomotor control Saccade Macaca Saccadic adaptation Motor learning business Psychology Neuroscience psychological phenomena and processes 030217 neurology & neurosurgery |
| Zdroj: | Journal of Neurophysiology. 108:2819-2826 |
| ISSN: | 1522-1598 0022-3077 |
| DOI: | 10.1152/jn.00212.2012 |
| Popis: | The saccadic amplitude of humans and monkeys can be adapted using intrasaccadic target steps in the McLaughlin paradigm. It is generally believed that, as a result of a purely retinal reference frame, after adaptation of a saccade of a certain amplitude and direction, saccades of the same amplitude and direction are all adapted to the same extent, independently from the initial eye position. However, recent studies in humans have put the pure retinal coding in doubt by revealing that the initial eye position has an effect on the transfer of adaptation to saccades of different starting points. Since humans and monkeys show some species differences in adaptation, we tested the eye position dependence in monkeys. Two trained Macaca fascicularis performed reactive rightward saccades from five equally horizontally distributed starting positions. All saccades were made to targets with the same retinotopic motor vector. In each session, the saccades that started at one particular initial eye position, the adaptation position, were adapted to shorter amplitude, and the adaptation of the saccades starting at the other four positions was measured. The results show that saccades that started at the other positions were less adapted than saccades that started at the adaptation position. With increasing distance between the starting position of the test saccade and the adaptation position, the amplitude change of the test saccades decreased with a Gaussian profile. We conclude that gain-decreasing saccadic adaptation in macaques is specific to the initial eye position at which the adaptation has been induced. |
| Databáze: | OpenAIRE |
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