Browsing by Subject "Vision, Ocular"
Now showing items 1-14 of 14
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Behavioural and physiological limits to vision in mammals.
(Philosophical transactions of the Royal Society of London. Series B, Biological sciences, 2017-04)Human vision is exquisitely sensitive-a dark-adapted observer is capable of reliably detecting the absorption of a few quanta of light. Such sensitivity requires that the sensory receptors of the retina, rod photoreceptors, ... -
Cell type-specific changes in retinal ganglion cell function induced by rod death and cone reorganization in rats.
(Journal of neurophysiology, 2017-07)We have determined the impact of rod death and cone reorganization on the spatiotemporal receptive fields (RFs) and spontaneous activity of distinct retinal ganglion cell (RGC) types. We compared RGC function between healthy ... -
Comparative genomics reveals insights into avian genome evolution and adaptation.
(Science, 2014-12-12)Birds are the most species-rich class of tetrapod vertebrates and have wide relevance across many research fields. We explored bird macroevolution using full genomes from 48 avian species representing all major extant clades. ... -
Compensatory saccades made to remembered targets following orbital displacement by electrically stimulating the dorsomedial frontal cortex or frontal eye fields of primates.
(Brain Res, 1996-07-15)If the eye-position signal during visually-evoked saccades is dependent on the dorsomedial frontal cortex (DMFC), one would expect that saccades generated to briefly presented visual targets would be disrupted after displacement ... -
Correlated firing among major ganglion cell types in primate retina.
(The Journal of physiology, 2011-01)Retinal ganglion cells exhibit substantial correlated firing: a tendency to fire nearly synchronously at rates different from those expected by chance. These correlations suggest that network interactions significantly shape ... -
Dopaminergic modulation of retinal processing from starlight to sunlight.
(Journal of pharmacological sciences, 2019-05-04)Neuromodulators such as dopamine, enable context-dependent plasticity of neural circuit function throughout the central nervous system. For example, in the retina, dopamine tunes visual processing for daylight and nightlight ... -
Express saccades elicited during visual scan in the monkey.
(Vision Res, 1994-08)Monkeys trained to saccade to visual targets can develop separate "express" and "regular" modes in their distribution of saccadic latencies. The purpose of this study was to determine whether this occurs under more natural ... -
High-sensitivity rod photoreceptor input to the blue-yellow color opponent pathway in macaque retina.
(Nat Neurosci, 2009-09)Small bistratified cells (SBCs) in the primate retina carry a major blue-yellow opponent signal to the brain. We found that SBCs also carry signals from rod photoreceptors, with the same sign as S cone input. SBCs exhibited ... -
Night-vision brain area in migratory songbirds.
(Proc Natl Acad Sci U S A, 2005-06-07)Twice each year, millions of night-migratory songbirds migrate thousands of kilometers. To find their way, they must process and integrate spatiotemporal information from a variety of cues including the Earth's magnetic ... -
Spatial vision in the purple sea urchin Strongylocentrotus purpuratus (Echinoidea).
(J Exp Biol, 2010-01-15)Recent evidence that echinoids of the genus Echinometra have moderate visual acuity that appears to be mediated by their spines screening off-axis light suggests that the urchin Strongylocentrotus purpuratus, with its higher ... -
The feeling of looking.
(Nat Neurosci, 2007-05) -
The steady-state visual evoked potential in vision research: A review.
(J Vis, 2015)Periodic visual stimulation and analysis of the resulting steady-state visual evoked potentials were first introduced over 80 years ago as a means to study visual sensation and perception. From the first single-channel recording ... -
The time course of segmentation and cue-selectivity in the human visual cortex.
(PLoS One, 2012)Texture discontinuities are a fundamental cue by which the visual system segments objects from their background. The neural mechanisms supporting texture-based segmentation are therefore critical to visual perception and ... -
What the brain stem tells the frontal cortex. II. Role of the SC-MD-FEF pathway in corollary discharge.
(J Neurophysiol, 2004-03)One way we keep track of our movements is by monitoring corollary discharges or internal copies of movement commands. This study tested a hypothesis that the pathway from superior colliculus (SC) to mediodorsal thalamus ...
