-shi, S ber 2 Desimone et al., 1985; Maunsell and Newsome, 1987). The dorsal

Over 25 distinct areas including their anatomical connections and functional properties are known in macaque monkey visual cortex (Van Essen, 1985;Maunsell and Newsome, 1987; Felleman and Van Essen, 1991). These areas have been divided into two anatomically and functionally interconnected processing streams — “dorsal ” and “ventral”, both of which originate in the primary visual cortex (V1) (Ungerleider and Mishkin, 1982; Van Essen and Maunsell, 1983; 1987). In macaque monkeys the ratio increases from 1:35 at the fovea to 1:5 at 15 ° eccentricity (Azzopardi et al., 1999). Similar ratios were reported in humans (Dacey and Petersen, 1992). In humans, over a dozen cortical areas with visual functions have been differentiated (Sereno et al., 1995; Wandell et al., 2005; Schluppeck et al., 2005; Silver et al., 2005; Tyler et al., 2005). In homology with monkeys, these areas have been divided into dorsal and ventral processing streams (Haxby et al., 1991; Ungerleider and Haxby, 1994). Most of our knowledge about the functional organization of these areas comes from fMRI studies (Sereno et al.,Precise mapping of early visual