Voluntary modulation of saccadic peak velocity associated with individual differences in motivation.
Incentives
Main sequence
Motivation
Saccades
Voluntary control
Journal
Cortex; a journal devoted to the study of the nervous system and behavior
ISSN: 1973-8102
Titre abrégé: Cortex
Pays: Italy
ID NLM: 0100725
Informations de publication
Date de publication:
01 2020
01 2020
Historique:
received:
23
04
2018
revised:
21
09
2018
accepted:
04
12
2018
pubmed:
15
1
2019
medline:
22
6
2021
entrez:
15
1
2019
Statut:
ppublish
Résumé
Saccadic peak velocity increases in a stereotyped manner with the amplitude of eye movements. This relationship, known as the main sequence, has classically been considered to be fixed, although several recent studies have demonstrated that velocity can be modulated to some extent by external incentives. However, the ability to voluntarily control saccadic velocity and its association with motivation has yet to be investigated. Here, in three separate experimental paradigms, we measured the effects of incentivisation on saccadic velocity, reaction time and preparatory pupillary changes in 53 young healthy participants. In addition, the ability to voluntarily modulate saccadic velocity with and without incentivisation was assessed. Participants varied in their ability to increase and decrease the velocity of their saccades when instructed to do so. This effect correlated with motivation level across participants, and was further modulated by addition of monetary reward and avoidance of loss. The findings show that a degree of voluntary control of saccadic velocity is possible in some individuals, and that the ability to modulate peak velocity is associated with intrinsic levels of motivation.
Identifiants
pubmed: 30638586
pii: S0010-9452(18)30408-8
doi: 10.1016/j.cortex.2018.12.001
pmc: PMC6970223
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
198-212Subventions
Organisme : Wellcome Trust
Pays : United Kingdom
Organisme : Medical Research Council
ID : MC_UU_00005/2
Pays : United Kingdom
Organisme : Medical Research Council
ID : MR/P00878X/1
Pays : United Kingdom
Informations de copyright
Copyright © 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.
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