By Risto Miikkulainen, James A. Bednar, Yoonsuck Choe, Joseph Sirosh
This ebook provides a unified computational method of realizing the constitution, improvement, and serve as of the visible cortex. It stories the present theories of the visible cortex and the organic facts on which they're established, and provides an in depth research of the laterally hooked up self-organizing map version and effects got thus far. including the software program package deal Topographica, it serves as a complete starting place for destiny examine in computational neuroscience of the visible cortex.
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Additional resources for Computational Maps in the Visual Cortex
The resulting patterns reﬂect correlations in the input. For example, when a kitten is made strabismic, thereby removing correlations between the visual inputs in the two eyes, the lateral connections in the primary visual cortex organize differently, linking only the regions responding to the same eye (L¨owel and Singer 1992). 4. In the mouse somatosensory barrel cortex, sensory deprivation (by sectioning the input nerve) results in shorter and sparser lateral connections compared with a normally reared animal (McCasland, Bernardo, Probst, and Woolsey 1992).
Reprinted with permission from Blasdel (1992b), copyright 1992 by the Society for Neuroscience; annotations added and brightness increased. group is further divided into areas that respond to particular orientations. In turn, each orientation-selective patch is often further subdivided into two patches, each preferring opposite directions of motion (Shmuel and Grinvald 1996; Weliky et al. 1996). Other stimulus features (such as spatial frequency and color) are represented as well, but are not as well organized at the large scale (Issa, Trepel, and Stryker 2001; Landisman and Ts’o 2002b).
They may mediate competition and synchronization over large distances of cortex (Taylor and Alavi 1996; Usher, Stemmler, and Niebur 1996; Wang 1996). 5. They may selectively enhance and suppress responses to implement attention and control (Taylor and Alavi 1996). 2 Lateral Connections 27 Representing and Associating Information 1. Lateral connections may store information that allows decorrelating visual input and ﬁltering out known statistical redundancies in the cortical representations (Barlow and F¨oldi´ak 1989; Dong 1996; Ghahramani and Hinton 1998; Sirosh, Miikkulainen, and Bednar 1996a).
Computational Maps in the Visual Cortex by Risto Miikkulainen, James A. Bednar, Yoonsuck Choe, Joseph Sirosh