This is a review of the research during the past 25years on cortical processing of color
signals. At the beginning of the period the modular view of cortical processing …

How are our brains functionally organized to achieve adaptive behavior in a changing
world? This article presents one alternative to the computer analogy that suggests brains are …

The pattern of local image velocities on the retina encodes important environmental
information. Although humans are generally able to extract this information, they can easily …

Gordon Lynn Walls, a comparative anatomist, observed,“If asked what aspect of vision
means the most to them, a watchmaker may answer 'acuity,'a night flier 'sensitivity,'and an …

A critical step in the interpretation of the visual world is the integration of the various local
motion signals generated by moving objects. This process is complicated by the fact that …

Signalling by intracellular second messengers such as cyclic nucleotides and Ca2+ is
known to regulate attractive and repulsive guidance of axons by extracellular factors …

How does an animal conceal itself from visual detection by other animals? This review
paper seeks to identify general principles that may apply in this broad area. It considers …

Pupil size not only varies to changes in illumination but is also modulated by several
cognitive factors, making it a potentially versatile physiological marker of cortical states. We …

During rapid eye movements, motion of the stationary world is generally not perceived
despite displacement of the whole image on the retina. Here we report that during saccades …

Event-based sensing, ie, the asynchronous detection of luminance changes, promises low-
energy, high dynamic range, and sparse sensing. This stands in contrast to whole image …