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Motivational modulation of endogenous inputs to the superior colliculus


Satel, J and Trappenberg, TP and Klein, RM, Motivational modulation of endogenous inputs to the superior colliculus, Proceedings of the 2005 IEEE International Joint Conference on Neural Networks, 31 July - 4 August, 2005, Montreal, QC, Canada, pp. 262-267. (2005) [Refereed Conference Paper]

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Proper initiation of saccadic eye movements depends on an intricate balance between exogenous and endogenous control mechanisms. The superior colliculus (SC) is a major site of signal integration that has been shown to drive the initiation of saccades in the brainstem. Previous work has shown that a winner-take-all mechanism implemented with a continuous attractor neural network (CANN) can explain and reproduce a multitude of behavioural findings, including the gap effect and the production of express saccades [1], [2]. This investigation advances the CANN model of saccade initiation in several important ways in order to account for trial by trial adaptation of saccadic reaction times in a biologically plausible manner. A key hypothesis is that endogenous inputs to the intermediate layer of the SC can be adapted through motivationally-based feedback from other areas of the brain such as the basal ganglia or higher cortical areas.

Item Details

Item Type:Refereed Conference Paper
Research Division:Psychology
Research Group:Cognitive and computational psychology
Research Field:Memory and attention
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in psychology
UTAS Author:Satel, J (Dr Jason Satel)
ID Code:111157
Year Published:2005
Deposited By:Psychology
Deposited On:2016-09-01
Last Modified:2016-10-18

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