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Learning complex cell units from simulated prenatal retinal waves with slow feature analysis
BMC Neuroscience volume 10, Article number: P129 (2009)
Many properties of the developing visual system are structured and organized before the onset of vision. Spontaneous neural activity, which spreads in waves across the retina, has been suggested to play a major role in these prenatal structuring processes . Recently, it has been shown that when employing an efficient coding strategy, such as sparse coding, these retinal activity patterns lead to basis functions that resemble optimal stimuli of simple cells in V1 .
Here we present the results of applying a coding strategy that optimizes for temporal slowness, namely Slow Feature Analysis (SFA) , to a biologically plausible model of retinal waves  (see figure 1). We also tested other wave-like inputs (sinusoidal waves, moving Gauss blobs) that allow for an analytical understanding of the results. Previously, SFA has been successfully applied in modeling parts of the visual system, most notably in reproducing a rich set of complex cell features by training SFA with natural image sequences . In this work, we were able to obtain complex-cell like receptive fields in all input conditions, as displayed in figure 2.
Our results support the idea that retinal waves share relevant temporal and spatial properties with natural images. Hence, retinal waves seem suitable training stimuli to learn invariances and thereby shape the developing early visual system so that it is best prepared for coding input from the natural world.
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Dähne, S., Wilbert, N. & Wiskott, L. Learning complex cell units from simulated prenatal retinal waves with slow feature analysis. BMC Neurosci 10, P129 (2009) doi:10.1186/1471-2202-10-S1-P129
- Visual System
- Receptive Field
- Complex Cell
- Natural Image
- Sparse Code