Lancaster EPrints

Saccadic Eye Movements in Parkinson's Disease: I. Delayed Saccades

Lueck, C. J. and Tanyeri, S. and Kennard, C. and Crawford, Trevor and Henderson, L. (1992) Saccadic Eye Movements in Parkinson's Disease: I. Delayed Saccades. The Quarterly Journal of Experimental Psychology Section A : Human Experimental Psychology, 45 (2). pp. 193-210. ISSN 0272-4987

Full text not available from this repository.

Abstract

The saccadic eye movements of nine patients with Parkinson’s disease were compared to those of nine age-matched controls in two paradigms generating volitional saccades. In both paradigms. subjects had to make delayed saccades to peripheral LED targets: a peripheral target appeared 700 msec before a buzzer sounded, the buzzer being the signal to make a saccade to the target. In the first paradigm (“centre-off“), the fixation target was extinguished simultaneously with buzzer onset. In the second (“centreremain”) it was not extinguished until 1000 msec later. The results showed that for outward saccades in both paradigms, there was no difference between Parkinsonian patients and controls, but saccadic latencies were significantly shorter in the “centre-remain” paradigm. The initial outward saccades were indistinguishable from the normal, reflex saccades of the same subjects. However, saccades returning to the centre (a type of remembered target saccade) were hypometric and showed multistepping. Both effects were more pronounced in patients with Parkinson’s disease. The significance of these findings in terms of current hypotheses about the nature of the Parkinsonian saccadic deficit is discussed.

Item Type: Article
Journal or Publication Title: The Quarterly Journal of Experimental Psychology Section A : Human Experimental Psychology
Uncontrolled Keywords: Saccade ; Parkinson's disease
Subjects: B Philosophy. Psychology. Religion > BF Psychology
Departments: Faculty of Science and Technology > Psychology
ID Code: 58201
Deposited By: ep_importer_pure
Deposited On: 16 Oct 2012 14:50
Refereed?: Yes
Published?: Published
Last Modified: 28 Oct 2013 11:25
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/58201

Actions (login required)

View Item