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Peri-saccadic space perception

Peri-saccadic space perception

When we look at a scene we feel we perceive the visual world in all its detail and richness. What leads us to the experience of visual space and how do we integrate perception across eye movements? Even prior to saccade onset, studies using briefly flashed stimuli, revealed changes in perception such as a compression of the visual space. However, neither the neural mechanisms responsible for 'compression', nor its role in perception have been revealed. We have developed a neurocomputational model to further guide research in this area.

Model

The model (see Hamker et al., PLOS Comp. Biol, in press) consists of two layers. Layer 1 encodes the presented stimulus position as an active population in a cortical coordinate system considering RF size and magnification. This population gets distorted by a oculomotor or attentive feedback signal. The pooled distorted population is represented in Layer 2 and used to determine the perceived position.

Funding

Federal Ministry of Education and Research (BMBF) grant within the program "Research network for cognitive abilities and their disorders in humans"
 

Relevant Publications

Hamker, F. H., Zirnsak, M., Ziesche, A., Lappe, M. (2011)
Computational models of spatial updating in peri-saccadic perception
Phil. Trans. R. Soc. B (2011). 366, 554-571.
PDF-document

Zirnsak, M., Lappe, M., Hamker, F. H. (2010)
The spatial distribution of receptive field changes in a model of peri-saccadic perception: predictive remapping and shifts towards the saccade target.
Vision Research. 50:1328-1337.
PDF-document

Hamker, F. H., Zirnsak, M., and Lappe, M. (2008)
About the influence of post-saccadic mechanisms for visual stability on peri-saccadic compression of object location.
J. Vision. 8(14):1, 1-13.
PDF-document

Hamker, F. H., Zirnsak, M., and Lappe, M. (2008).
About the influence of post-saccadic mechanisms for visual stability on peri-saccadic compression of object location.
J. Vision. 8(14):1, 1-13.
PDF-document

Georg, K., Hamker, F. H., and Lappe, M. (2008).
Influence of adaptation state and stimulus luminance on peri-saccadic localization.
J. Vision 8(1):15, 1-11.
PDF-document

Hamker, F.H., Zirnsak, M., Calow, D., Lappe, M. (2008)
The peri-saccadic perception of objects and space.
PLOS Computational Biology 4(2):e21
PDF-document

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