Formation of direction selectivity in natural scene environments

Most simple and complex cells in the cat striate cortex are both orientatio n and direction selective. In this article we use single-cell learning rule s to develop both orientation and direction selectivity in a natural scene environment. We show that a simple principal component analysis rule is ina dequate for developing direction selectivity, but that the BCM rule as well as similar higher-order rules can. We also demonstrate that the convergenc e of lagged and nonlagged cells depends on the velocity of motion in the en vironment, and that strobe rearing disrupts this convergence, resulting in a loss of direction selectivity.