New experiments and theory reveal how the ability to see image details depends upon photoreceptor function and eye movements, and how fruit flies (Drosophila) see spatial details beyond the optical limit of their compound eyes.
Slow, continuous changes in eye position when gaze is fixed, previously believed to be random drifts, are shown to exhibit highly systematic and short-latency response characteristics to visual stimuli.
Visual narrow-band gamma rhythms are reduced in mild cognitive impairment and Alzheimer’s disease, confirming previous rodent research and forming crucial first steps for development of EEG-based biomarkers for humans.
The pattern of spatial attention preferences in caudate neurons is altered by superior colliculus inactivation, demonstrating that a superior colliculus to basal ganglia link is important for selective attention.
Fixational eye movements transform the spatial scene into temporal modulations on the retina, which, together with the known sensitivities of retinal neurons, provide a comprehensive account of human spatial sensitivity.
Electrophysiological recordings in monkeys reveal that cerebellar complex spikes encode future reward size when reward information is first made available, but not during reward delivery or smooth pursuit eye movement.