Visual perception. Medical search. Frequent questions

The lateral geniculate nucleus, which transmits the information to the visual cortex. (wikipedia.org)
The lateral geniculate nucleus sends signals to primary visual cortex, also called striate cortex. (wikipedia.org)
Extrastriate cortex, also called visual association cortex is a set of cortical structures, that receive information from striate cortex, as well as each other. (wikipedia.org)
Recent descriptions of visual association cortex describe a division into two functional pathways, a ventral and a dorsal pathway. (wikipedia.org)
Finally, the visual information that our eyes receive is sent to the visual cortex in the occipital lobe. (cognifit.com)
Specifically, we propose to use two-photon calcium imaging to recognize single neurons with particular functional properties in mouse visual cortex and accurately identify their location within the network. (europa.eu)
Here, we performed two-photon population calcium imaging in L2/3 primary visual cortex (V1) of headfixed mice performing a visual detection task while simultaneously activating specific groups of neurons using targeted two-photon optogenetics during low contrast visual stimulation. (biorxiv.org)
This symposium will highlight current concepts of the organization of visual cortex and their relation to perception and plasticity. (visionsciences.org)
We will describe data-analysis techniques to reconstruct receptive field properties of neural populations, and extend them to visual field maps and clusters within human and macaque visual cortex. (visionsciences.org)
The link between visual cortex' organization, perception and plasticity is a fundamental part of vision science. (visionsciences.org)
We describe a method that reconstructs population receptive field (pRF) properties in human visual cortex using fMRI. (visionsciences.org)
Using locally designed and constructed experiment systems capable of recording simultaneously from tens of neurons, we have conducted neurophysiological studies on early and mid-stage visual areas in mammalian visual cortex. (nii.ac.jp)
We have also obtained information regarding the degree of integration of neural circuitry that shape stimulus selectivities of high-order neurons based on the input from low-order neurons within the visual cortex. (nii.ac.jp)
Journal Article] patial range and laminar structures of neuronal correlations in the cat primary visual cortex. (nii.ac.jp)

A person can have problems with visual perceptual processing even if they have 20/20 vision. (wikipedia.org)
A team led by Giorgia Silani, in collaboration with Helmut Leder, of the Faculty of Psychology, University of Vienna, and scientists of the University of Trieste and SISSA have explored, in a series of 4 experiments, how low level perceptual features and visual exploration strategies can facilitate or not the occurrence of this phenomenon. (newswise.com)
Such gaze shifts are themselves a source of powerful retinal stimulation, and so the visual system appears to have evolved mechanisms to maintain perceptual stability during movements of the eyes in space. (jneurosci.org)
Importantly, because our model can be characterized by a simple closed-form expression, it also makes specific predictions about the outcome of future psychophysical experiments and the characteristics of brain structures that might be involved in perceptual estimates of the metrics of visual space. (jneurosci.org)
Disease and disorder research has been conducted in relation to the Visual Perception Pathway and Illusions, Perceptual Disorders, Impairment (finding), Blind Vision, Malnutrition. (novusbio.com)
The finding in the work is that the human perceptual system rapidly adjusts to a substantive alteration in the statistics of the visual world, which, as we show, is what happens when someone is playing video games," Gerhardstein said. (binghamton.edu)
However, the computational processes within a visual field map do not have to coincide with perceptual qualities. (visionsciences.org)
Indeed most perceptual functions are associated with multiple visual field maps and even multiple cortical regions. (visionsciences.org)
It is argued that seeing that P is a mode of knowing that P that is to be explained in terms of the exercise of visual-perceptual recognitional abilities. (stir.ac.uk)
Since in certain settings the visual system assigns a common perceptual fate to the entire collection of micro-elements entering into these gestalts, something seems to be acting to hold them together as a group which the system recognizes as such. (settheory.com)
All students were submitted to the Developmental Test of Visual Perception - DTVP-2, composed of eight subtests that measure visual-motor skills interrelated with different visual perceptual ones. (bvsalud.org)

The major problem in visual perception is that what people see is not simply a translation of retinal stimuli (i.e., the image on the retina). (wikipedia.org)
infant perception , process by which a human infant (age 0 to 12 months) gains awareness of and responds to external stimuli. (britannica.com)
The study used a well-known visual-matching task, in order to detect the occurrence of the inversion effect (i.e the lower performance when stimuli are presented in the unusual upside-down orientation, usually observed when processing faces or human bodies vs. objects) in different stimulus categories: namely sexualized targets, non-sexualized targets and real objects. (newswise.com)
By varying the low level visual properties of the stimuli, Cogoni and colleagues explored whether this effect is driven by differences in stimulus asymmetry. (newswise.com)
N200 and P300 were the two reliable markers of conscious visual perception common to all perceived stimuli and absent for all non-perceived stimuli. (frontiersin.org)
The second had college students play four hours of Minecraft - one of the most popular computer games in the world - before and after showing them visual stimuli. (binghamton.edu)
Although many studies have shed light on how perception corresponds to neural activity, a causal relationship between the occurrence of particular neural events and the perception of sensory stimuli has yet to be established. (europa.eu)

Moreover, infants' own motion also contributes to motion perception. (britannica.com)
Despite the complex nature of motion, nearly all types of motion perception develop by about six months in healthy infants. (britannica.com)
Motion perception is a critical capability determining a variety of aspects of insects' life, including avoiding predators, foraging and so forth. (lincoln.ac.uk)
This article reviews the computational motion perception models originating from biological research of insects' visual systems in the literature. (lincoln.ac.uk)
These motion perception models or neural networks comprise the looming sensitive neuronal models of lobula giant movement detectors (LGMDs) in locusts, the translation sensitive neural systems of direction selective neurons (DSNs) in fruit flies, bees and locusts, as well as the small target motion detectors (STMDs) in dragonflies and hover flies. (lincoln.ac.uk)
Through these modelling studies, we summarise the methodologies that generate different direction and size selectivity in motion perception. (lincoln.ac.uk)
At last, we discuss about multiple systems integration and hardware realisation of these bio-inspired motion perception models. (lincoln.ac.uk)
In this issue, a thorough characterization of such a subject shows that he had instant sight for identification of simple shapes like a circle or triangle, with interesting abnormalities and a need for learning about more complicated visual objects, and almost completely spared motion perception. (nature.com)

In this article, we show that visual distance perception (VDP) is influenced by the auditory environmental context through reverberation-related cues. (nature.com)
Results of both experiments show that the auditory environment can influence VDP, presumably through reverberation cues related to the perception of room size. (nature.com)
Congruent visual information enhances auditory speech perception. (bournemouth.ac.uk)
This visual benefit has been widely observed in perception of segments and linked to reduced amplitudes and latencies of auditory N1 and P2 event-related potential (ERP) components when visual information was present. (bournemouth.ac.uk)
A loss of auditory acuity can be a life threatening situation for a firefighter, as so much of their work, when fighting a fire, takes place in an area where visual perception is significantly reduced or all together lost. (cdc.gov)

Specifically, we propose that perisaccadic compression is determined by the distance between the probe and saccade end point on a map that has a logarithmic representation of visual space, similar to those found in numerous cortical and subcortical visual structures. (jneurosci.org)
Moreover, the behavioural effects depended on overall performance: when the task was challenging for the mouse, V1 activity was more closely linked to performance, and cortical stimulation boosted perception. (biorxiv.org)
This notion relates the visual field maps to the idea of functional specialization, i.e. separate cortical regions are involved in different processes. (visionsciences.org)
Next, we extend conventional stimulus-referred notions of the receptive field to neural-referred properties, i.e. cortico-cortical receptive fields that capture the information flow between visual field maps. (visionsciences.org)
PRF sizes increase between visual areas and with eccentricity, but when expressed in V1 cortical surface area (i.e., cortico-cortical pRFs), they are constant across eccentricity in V2 and V3. (visionsciences.org)

Can this 'periodic table' of higher visual disorders supplant previous inventories of visual phenomenology based on irritative, inhibitory and release mechanisms? (bmj.com)
To characterize the findings of visual perception in students with learning disorders. (bvsalud.org)

The result of this information being interpreted and received by the brain is what we call visual perception, vision, or sight. (cognifit.com)
The unusual case of a man who regained his sight after 40 years of blindness allows researchers to examine the neural and behavioral effects of losing visual experience on the establishment and maintenance of visual system function in humans. (nature.com)
von Senden, M. Space and Sight: the Perception of Space and Shape in the Congenitally Blind Before and After Operation (1932) (Methuen, London, 1960). (nature.com)
Visual perception of health (VPH) was estimated within 15 s from first sight and stratified into tertiles (poor/intermediate/good health). (lu.se)

At the smallest scale, the receptive field is a property of individual neurons and summarizes the region of the visual field where visual stimulation elicits a response. (visionsciences.org)

In some cases, the patient's altered perceptions can result in behavioral toxicity, in which an individual fails to appreciate dangers in the environment and may be injured. (medscape.com)
Background: In clinic, a subjective visual estimation of a patient's general health often guides interventions, yet little is known of how this assessment relates to objectively measured frailty. (lu.se)

They may also have trouble sleeping at night or may experience visual hallucinations (seeing people, objects or shapes that are not actually there). (cdc.gov)

The various physiological components involved in vision are referred to collectively as the visual system, and are the focus of much research in linguistics, psychology, cognitive science, neuroscience, and molecular biology, collectively referred to as vision science. (wikipedia.org)
Newswise - A controversial hypothesis, named the Sexualized Body Inversion Hypothesis (SBIH), claims similar visual processing of sexually objectified women or men (i.e., with a focus on the sexual body parts) and inanimate objects, suggesting a possible cognitive mechanism behind the consequence of human sexual objectification. (newswise.com)
It turns out that our visual perception is highly adaptable, according to research from Psychology Professor and Cognitive and Brain Sciences Coordinator Peter Gerhardstein's lab at Binghamton University. (binghamton.edu)
Five films are followed by six scientific inputs covering the specialist areas of climate research and cognitive perception as well as questions of power, law and resources in the two cultural regions. (unilu.ch)
Some patients have a predominance of cognitive changes, while others present with prominent ataxia, hemiparesis or paraparesis, depression, or visual symptoms. (medscape.com)

A good number of motion detectors have been identified in the insects' visual pathways. (lincoln.ac.uk)

We will then test the influence of induced action potentials in this functionally defined subset of neurons on visual detection performance of mice. (europa.eu)
This approach will enable us to determine how many and which neurons are important for visual performance and assess their contribution to visual perception. (europa.eu)
These receptive fields are organized into visual field maps, where neighboring neurons process neighboring parts of the visual field. (visionsciences.org)

Computational modelling of these motion detectors has not only been providing effective solutions to artificial intelligence, but also benefiting the understanding of complicated biological visual systems. (lincoln.ac.uk)

Understanding how neural activity corresponds to visual perception has been a milestone question in neuroscience research. (europa.eu)
Our understanding of the link between neural activity and perception remains incomplete. (biorxiv.org)

John Dillenberger has written the first comprehensive account of the relation between the visual arts and theological currents in Europe during the first half of the sixteenth century. (google.ca)
The students of GI presented inferior performances in the skills of eye-hand coordination, position in space, copying, visual closure, visual-motor speed and form constancy in relation to the students of GII. (bvsalud.org)

said, "We found that the tuning of the human visual system is highly conditional on stimulus-specific variations in a way that is not predicted by previous proposals. (icr.org)
This approach enabled us to study general markers of conscious visual perception independent of stimulus content, characterize their onset and its variability within one study. (frontiersin.org)
Only activation of groups of cells with similar tuning to the relevant visual stimulus led to a measurable bias of detection behaviour. (biorxiv.org)
Targeted photostimulation revealed signatures of centre-surround, predominantly inhibitory and like-to-like connectivity motifs in the local network which shaped the visual stimulus representation and partially explained the change in stimulus detectability. (biorxiv.org)

Thus, separate perception mechanisms may exist for different types of motion. (britannica.com)
This perisaccadic compression of visual space has been the subject of much research, but few studies have attempted to relate it to specific brain mechanisms. (jneurosci.org)
However, in the laboratory it becomes possible to induce highly inaccurate spatial percepts that may provide insights into the brain mechanisms that underlie the perception of visual space. (jneurosci.org)

Furthermore, we will consider how these neural properties change with the state of chronic visual deprivation due to damage to the visual system, and in subjects with severely altered visual input due to prism-adaptation. (visionsciences.org)

The perception of appearance, especially facial, affects one's social behavior, with significant consequences in areas such as education, as well as one's professional and the affective life 3,4,5 . (bvsalud.org)

Time permitting, I would like to do more post-graduate study in visual perception and neuroscience and possibly create additional courses around these areas for our college. (aop.org.uk)

colour perception and colour constancy - the ability to distinguish different colours and to recognise different shades of colour and light intensities. (shirleys-preschool-activities.com)
shape perception and shape constancy - the ability to recognise shapes and to recognise a shape regardless of size, colour or the angle from which it is viewed. (shirleys-preschool-activities.com)

Reification is an aspect of perception in which the object as perceived contains more spatial information than what is actually present. (smashingmagazine.com)
The organization of the visual system can be described at different spatial scales. (visionsciences.org)
The results revealed a statistically significant difference between GI and GII, demonstrating that GI presented changes that indicate a deficit of visual-motor perception, even though spatial relations and figure ground skills are intact. (bvsalud.org)

Visual acuity , the ability to distinguish fine detail, is estimated at about 20/400 for most newborns. (britannica.com)

The concise content of both instructions dealt with a regular 9th grade syllabus issue, the visual perception. (uni-bayreuth.de)

The current study compared the N1/P2 reduction in Mandarin lexical tones and consonants perception with a discrimination task. (bournemouth.ac.uk)

Balint syndrome is the triad of simultanagnosia, optic ataxia (misreaching for visual targets), and ocular apraxia (inability to control voluntary eye movements, although the eyes can move spontaneously in all directions). (msdmanuals.com)

As an example, a patient may present with paresthesias of a hand that resolve, followed a few months later by weakness in a leg or visual disturbances (eg, diplopia). (medscape.com)

An interpretable model predicts visual outcomes of no light perception eyes after open globe injury. (bvsalud.org)
This study aimed to develop a model to predict the visual outcomes of vitrectomy surgery in OGI-NLP eyes using a machine learning algorithm and to provide an interpretable system for the prediction results. (bvsalud.org)

Visual perception is the ability to interpret the surrounding environment through photopic vision (daytime vision), color vision, scotopic vision (night vision), and mesopic vision (twilight vision), using light in the visible spectrum reflected by objects in the environment. (wikipedia.org)
The first was the "emission theory" of vision which maintained that vision occurs when rays emanate from the eyes and are intercepted by visual objects. (wikipedia.org)
Stereoscopic depth cues provide information about distances of objects in near space as a function of their relative horizontal positions in the visual field. (britannica.com)
This last result suggests that the information provided by the place where the subject and the target are located, which we call "environmental-context information", can also influence the perception of objects and events presented within it. (nature.com)
Our ability to explore our surroundings requires a combination of high-resolution vision and frequent rotations of the visual axis toward objects of interest. (jneurosci.org)
Under this assumption, the psychophysical data on perisaccadic compression can be appreciated intuitively by imagining that, around the time of a saccade, the brain confounds nearby oculomotor and sensory signals while attempting to localize the position of objects in visual space. (jneurosci.org)
visual analysis and synthesis - the ability to differentiate between parts and whole objects e.g. letters that make up words. (shirleys-preschool-activities.com)
In order to reproduce translucent objects by 3D printers employing fully transparent (or clear) material, modeling the human visual perception of translucency is crucial. (fraunhofer.de)
Recent evidence suggests that normal aging is typically accompanied by impairment in the ability to perceive the global (overall) motion of visual objects in the world. (nottingham.ac.uk)

My professional passion and current focus for my scholarly activity is the area of visual perception and psychology. (aop.org.uk)

Therefore, we believe that this symposium will be of interest to a wide range of visual scientists, including students, researchers and faculty. (visionsciences.org)

Depth perception also gradually develops during the first several months. (britannica.com)
Binocular disparity is explained in more detail in the Demonstration 'Binocular Disparity (Visual Depth Perception 7)' and the addition of convergence for depth is in 'Disparity, Convergence, and Depth (Visual Depth Perception 10)' (see Related Links). (wolfram.com)
see the Demonstration 'Dynamic Approximation of Static Quantities (Visual Depth Perception 14)' in the Related Links. (wolfram.com)

Alhazen (965 - c. 1040) carried out many investigations and experiments on visual perception, extended the work of Ptolemy on binocular vision, and commented on the anatomical works of Galen. (wikipedia.org)
our visual system can adapt to changes swiftly, as the group's two experiments show. (binghamton.edu)

So I was just staring, focused on a single point on the wall, mind still, and I kept this up even while my visual perception began to fall apart (as it does due to the sensory tolerance of staring at the same image for so long -- this much I knew would happen even from my early childhood when I'd zone out and daydream while staring at trees or things). (kirsle.net)
The collection also reaches beyond its Graeco-Roman visual framework, showcasing how ancient ideas have influenced the longue durée of western sensory thinking. (kent.ac.uk)

These findings suggest that lexical tone perception was also helped by visual information as found in consonants. (bournemouth.ac.uk)

Future posts in this series will consider aspects of design like space, balance and visual hierarchy. (smashingmagazine.com)
PRF sizes increase with increasing eccentricity and up the visual hierarchy. (visionsciences.org)

We show that it is first and foremost the amplitude fluctuation in the condition without conscious perception that explains the observed variability in onset latencies of the markers of conscious visual perception. (frontiersin.org)

However, we have derived a novel formulation that captures the interaction between oculomotor and visual signals on a retinotopic map and have tested this hypothesis psychophysically across a wide range of conditions. (jneurosci.org)
The research team, led by Dr William Harrison, made the discovery by recording brain activity from volunteers while they passively viewed displays, engineered to elicit specific neural signals related to visual processing. (icr.org)

Only a few visual functional measures showed significant noise induced changes of possible import and these could not be altogether replicated in a second phase designed to test for adaptation of the effects. (cdc.gov)

The Division for Art History and Visual Studies at Lund University conducts research about older, modern and contemporary art, from historical, social and aesthetic angles of approach. (lu.se)

In such maps, the foveal region is vastly overrepresented, leading to a distorted representation of visual space. (jneurosci.org)
Many visual field maps exist, suggesting that every map contains a unique representation of the visual field. (visionsciences.org)

Visual perception refers to information that is perceived through the eyes. (shirleys-preschool-activities.com)

Evaluation of Luxor Brand Visual Identity: Tourists' Perception', International Journal of Tourism and Hospitality Management , 6(1), pp. 1-23. (ekb.eg)

Visual field maps are organized in clusters that share a similar eccentricity organization. (visionsciences.org)

There was no evolutionary description-detailed or otherwise-as to how the human brain processes visual information. (icr.org)
Early' processing is held to culminate in the formation of edge percepts, which the 'late' processes then exploit to form additional kinds of edge-determined motion and stereo percepts, and to begin grouping visual micro-elements into regions in preparation for the formation of still higher percepts. (settheory.com)

The human visual system is generally believed to be sensitive to visible light in the range of wavelengths between 370 and 730 nanometers (0.00000037 to 0.00000073 meters) of the electromagnetic spectrum. (wikipedia.org)
Neural tuning instantiates prior expectations in the human visual system. (icr.org)
So, the immediate takeaway is the impressive extent to which the young adult visual system can rapidly adapt to changes in the statistics of the visual environment," he said. (binghamton.edu)
Since edge percepts form the boundary between these two major processing stages, and since edges are known from much evidence to carry a large part of the information which the visual system extracts from scenes, a better understanding of how they are formed and represented within the visual system is of great interest. (settheory.com)
The same problem arises for edges as for many of the other gestalt fragments and gestalts formed in the visual system. (settheory.com)
The author suggests that natural vision depends on the eyes in the head on a body supported by the ground, the brain being only the central organ of a complete visual system. (booksbds.com)
When no constraints are put on the visual system, people look around, walk up to something interesting and move around it so as to see it from all sides, and go from one vista to another. (booksbds.com)

Other research groups who have examined the effects of digital exposure on other aspects of visual perception have concluded that long-term changes do take place, at least some of which are seen as helpful. (binghamton.edu)

Children need to good visual perception to discriminate well, copy text accurately, develop visual memory of things observed, develop good eye-hand co-ordination and integrate visual information while using other senses in order to perform tasks like recognising the source of a sound etc. (shirleys-preschool-activities.com)

Here we show that the onset times for the markers of conscious visual perception can strongly vary even within a single study. (frontiersin.org)
The study of the Visual Perception Pathway has been mentioned in research publications which can be found using our bioinformatics tool below. (novusbio.com)
We have 1468 products for the study of the Visual Perception Pathway that can be applied to Flow Cytometry, Immunocytochemistry/Immunofluorescence, Immunohistochemistry, Western Blot from our catalog of antibodies and ELISA kits. (novusbio.com)
Visual benefit in lexical tone perception in Mandarin: An event-related potential study. (bournemouth.ac.uk)
The purpose of the current study is to measure the perception of tourists toward Luxor's Visual Identity. (ekb.eg)

Although most children develop the ability to focus visually and to make fine discriminations in visual images as they grow, some children will take longer to develop these skills and may need some additional help, or additional practice. (shirleys-preschool-activities.com)
It is a bit hard to pull off, I get a strong urge to blink or move my eyes when my perception begins to fall apart, but with some practice you can power through this part. (kirsle.net)

The visual outcome of open globe injury (OGI)-no light perception (NLP) eyes is unpredictable traditionally. (bvsalud.org)

As an add on effort the continuous or impact noises were presented as subjects performed a dual task consisting of tracking a moving target in the middle of the visual field while responding to the onset of lights at the periphery. (cdc.gov)

visual conceptualizing - making pictures in the mind based on observations, experiences and data. (shirleys-preschool-activities.com)

In Lund, as internationally, the growing link between Art History and Visual Studies has made the research less disciplinary isolated, while the awareness of the disciplinary identity has been strengthened. (lu.se)

In hallucinogen persisting perception disorder (HPPD), patients who are not intoxicated experience symptoms (flashbacks) that initially arose during LSD use. (medscape.com)

The research focuses on a basic element of vision: our perception of orientation in the environment. (binghamton.edu)

Anatomy20

Organisms3

Diseases17

Chemicals and Drugs2

Analytical, Diagnostic and Therapeutic Techniques and Equipment36

Psychiatry and Psychology91

Phenomena and Processes48

Disciplines and Occupations1

Anthropology, Education, Sociology and Social Phenomena4

Humanities4

Information Science13

Named Groups1

Health Care16

Cortex14

Perceptual11

Stimuli7

Motion perception8

Auditory5

Cortical5

Disorders2

Sight4

Stimulation1

Patient's2

Hallucinations1

Cognitive5

Pathways1

Neurons3

Computational1

Neural activity2

Relation2

Stimulus4

Mechanisms3

Deprivation1

Affects1

Neuroscience1

Constancy2

Spatial3

Acuity1

Content1

Discrimination1

Inability1

Disturbances1

Outcomes2

Objects9

Psychology1

Researchers1

Depth3

Experiments2

Sensory2

Findings1

Hierarchy2

Latencies1

Signals2

Functional1

Approach1

Representation2

Refers1

Evaluation1

Organization1

Processes2

System7

Exposure1

Integrate1

Study5

Practice2

Traditionally1

Subjects1

Observations1

Awareness1

Disorder1

Vision1