Seeing Motion and Apparent Motion

Seeing Motion and Apparent Motion

In apparent motion experiments, participants are presented with what is in fact a succession of two brief stationary stimuli at two different locations, but they report an impression of movement. Philosophers have recently debated whether apparent motion provides evidence in favour of a particular account of the nature of temporal experience. I argue that the existing discussion in this area is...

Seeing blur: 'motion sharpening' without motion.

It is widely supposed that things tend to look blurred when they are moving fast. Previous work has shown that this is true for sharp edges but, paradoxically, blurred edges look sharper when they are moving than when stationary. This is 'motion sharpening'. We show that blurred edges also look up to 50% sharper when they are presented briefly (8-24 ms) than at longer durations (100-500 ms) wit...

Visual Cortex: Seeing Motion

What happens in primary visual cortex (V1) when we look at a complex moving image? While motion responses have been investigated thoroughly at the level of single neurons [1–4], studies of motion representation at the level of maps have been restricted to stimuli composed of long bars. These stimuli are inherently ambiguous as to their direction of motion [1]. A recent study by Fitzpatrick and ...

Basics of seeing motion

Motion perception: seeing and deciding.

The primate visual system offers unprecedented opportunities for investigating the neural basis of cognition. Even the simplest visual discrimination task requires processing of sensory signals, formation of a decision, and orchestration of a motor response. With our extensive knowledge of the primate visual and oculomotor systems as a base, it is now possible to investigate the neural basis of...