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- Open Access
An activity-dependent computational model of development of the retinotopic map along the dorsoventral axis in the primary visual cortex
© Philips and Chakravarthy; licensee BioMed Central Ltd. 2014
- Published: 21 July 2014
- Primary Visual Cortex
- Primate Vision
- Activity Base Model
- Dorsoventral Axis
- Lateral Excitation
The afferent (μ ij,r1r2 ), lateral excitatory (E ij,kl ) and lateral inhibitory (I ij,kl ) weights adapt based on a normalized Hebbian mechanism. The input to the retinal layer consists of rectangular bars of varying dilation and rotation; since images on the retina could be considered as different projective transforms of the objects seen. The outer boundary of the V1 layer is also constrained to simulate the flattened V1 surface area (see Figure 1B). After training for 750 iterations (see Figure 1C), it may be observed in the developed map that eccentricity is mapped along the x-axis while the meridional angle is mapped along the y-axis, an organization that bears strong resemblance to the complex logarithmic map  (see Figure 1B, Figure 1D).
A neural activity based model for the development of retinotopic map along the dorsoventral axis is demonstrated and the final map developed is compared with experimental results approximated by the complex log map equations.
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