Behavioural aspects of cats’ saccades
(1993) Multisensory Control of Movement — ISBN: [9780198547853], p. 150-166, published
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- This chapter reviews some behavioural aspects of saccades recorded in alert, head-fixed, trained cats. The first part deals with characteristics of oblique saccades and their trajectory. The stretching of the smaller component of oblique saccades is mainly achieved by a prolongation of the deceleratory phase. The decelerator phase of centrifugal saccades can be controlled much more accurately in direction than the acceleratory period, and the generation of straight trajectories is more frequent when the eye returns to the primary eye position. Direction of the movement is thus a major factor that accounts for the trajectory of cats' saccades. Another factor is the initial position of the eye. These factors modify the dynamics of the components of oblique saccade and the co-ordination between them. The second part of the chapter is devoted to a behavioral analysis of slow corrective movements that follow the visually guided eye saccades. In the cat, the end of the saccadic eye displacement, or the intersaccadic period between a principal saccade and the following corrective saccade, often shows some long-lasting slow movements. Most of the saccadic eye shifts of cats end abruptly, but some of them are followed by a large displacement different from the preceding high-velocity movement. These drifts are target directed, and have been observed in trained and untrained cats. Some of these movements are obviously driven by a system reducing the residual error at the end of the saccade, referred to as “slow correcting movements.”
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Missal, M., Crommelinck, M., & Roucoux, A. (1993). Behavioural aspects of cats’ saccades. In Alain Berthoz (ed.), Multisensory Control of Movement (p. p. 150-166). Oxford University Press. https://doi.org/10.1093/acprof:oso/9780198547853.003.0079