• neural
  • Application of drugs that deactivate this glutamate receptor type led to reduced neural responses in the visual system of cats, and some argue this suppression is similar to the reduced behavioral responses observed among patients with schizophrenia. (wikipedia.org)
  • These results may illustrate the role of GABA in mechanisms that regulate the overall level of neural activity in visual cortex, and it has been suggested that such mechanisms may be disrupted in schizophrenia. (wikipedia.org)
  • Such a disruption would be consistent with the GABA hypothesis of schizophrenia, which states that dysfunctional GABAergic inhibition may disrupt neural activity in subjects with this disorder, and this in turn may lead to visual processing abnormalities. (wikipedia.org)
  • Conclusions: Studies of Bálint's syndrome have provided unique evidence on neural substrates for attention, perception, and visuomotor control. (bmj.com)
  • These results were used to support physiological evidence that red light suppresses functioning of the Magnocellular visual neural pathway, with reading being better when longer wavelengths of light (red) are removed from the light source by the use of blue filters. (dyslexiadaily.com)
  • cortex
  • The cortical area MT (medial temporal cortex, also known as V5) plays a significant role in motion processing, and deactivation of this region using Transcranial magnetic stimulation can affect perception of motion. (wikipedia.org)
  • stimulus
  • 5. Visual reaction time may be defined as the interval between the onset of a stimulus and the initiation of the crewmember's response. (nasa.gov)
  • mechanisms
  • Here, we examine the integrity of suppressive center-surround mechanisms in motion perception of schizophrenic patients. (jneurosci.org)
  • Future studies should address possible underlying psychoanatomical mechanisms at "bottom up" and "top down" levels, and should specifically consider visual working memory and attention (including object based attention) as well as systems for identification of object structure and depth from binocular stereopsis, kinetic depth, motion parallax, eye movement signals, and other cues. (bmj.com)
  • In addition, the developmental Gerstmann syndrome ( Kinsbourne and Warrington, 1963 ) is characterized, among other symptoms, by dyscalculia and constructional dyspraxia ( Rourke and Conway, 1997 ), which might suggest a role of hand motor planning mechanisms in the development of numerical abilities. (frontiersin.org)
  • behavior
  • 6. 5 million people aged 55 years and older are consecuencias al usar misoprostol age- related vision loss, which singu lair manifest as an alteration in sensation, behavior, movement, perception, avalable consciousness (Hickey, 2003). (luxbar-starway.ru)
  • frequency
  • This apparent variance in perception is influenced when it is viewed by different observers and when the background and central target patch are placed on "non-overlapping spatial frequency bands", as explained by Chubb et al. (wikipedia.org)
  • equally
  • Although the two central target patches are equally bright (identical in luminance) the one on a dark background appears lighter and the one on a lighter background appears darker. (wikipedia.org)
  • Nor was it purely visual, in which case both hands should have been affected equally (the right hand was worse). (bmj.com)
  • syndrome
  • She has also claimed that a treatment for scotopic sensitivity syndrome could help a number of incarcerated individuals and delinquent children. (wikipedia.org)
  • According to Helveston, the scotopic sensitivity syndrome and its treatment has, as a phenomenon, resulted in classic group behaviour and has the characteristics of a fad with a charismatic personality as a leader and the supporting evidence being mostly anecdotal. (wikipedia.org)
  • In the case of Bálint's syndrome, the visual world is perceived erratically, as a series of single objects. (bmj.com)
  • The goal of this review is to explore a range of psychological and anatomical explanations for this striking visual disorder and to propose new directions for interpreting the findings in Bálint's syndrome and related cerebral disorders of visual processing. (bmj.com)
  • spatial
  • 1) "Spatial disorder of attention": an inability to perceive at any one time the several items of a visual scene. (bmj.com)
  • performance
  • This section discusses aspects of visual performance that are, or are likely to be, modified by space travel. (nasa.gov)
  • Disclosed is a composition comprising MZ for use as a dietary supplement or food additive for oral consumption for improving the visual performance of a human subject. (patentsencyclopedia.com)
  • 13. The composition of claim 1, wherein the composition is for improving the visual performance of a subject in photopic conditions with a level of illumination greater than 3 Cdm.sup. (patentsencyclopedia.com)
  • 14. The composition of claim 1, wherein the composition is for improving the visual performance of a subject who has a normal level of macular pigment. (patentsencyclopedia.com)
  • 15. The composition of claim 1, wherein the composition is for improving the visual performance of a subject without age-related macular degeneration. (patentsencyclopedia.com)
  • 17. A method of improving the visual performance of a human subject in need of such improvement, the method comprising the step of administering to the subject an effective amount of a composition comprising MZ for use as a dietary supplement or food additive for oral consumption. (patentsencyclopedia.com)
  • 25. The method of claim 17, wherein performance of the method causes an improvement in visual performance of the subject in photopic conditions. (patentsencyclopedia.com)
  • 26. The method of claim 17, wherein performance of the method causes an improvement in visual performance of a subject who has a normal level of macular pigment. (patentsencyclopedia.com)
  • 27. The method of claim 17, wherein performance of the method causes an improvement in visual performance of a subject without age-related macular degeneration. (patentsencyclopedia.com)
  • 28. The method of claim 17, wherein performance of the method causes an improvement in visual performance of a subject with an atypical "central dip" macular pigment distribution. (patentsencyclopedia.com)
  • 29. A method of making a composition for human consumption, the composition to be consumed by a human subject for the purpose of improving visual performance, the method comprising the step of mixing an effective amount of MZ with an acceptable dietary diluent, excipient or carrier. (patentsencyclopedia.com)
  • One theory of macular pigment's (MP) presence in the fovea is to improve visual performance in glare. (arvojournals.org)
  • MP correlates with three aspects of visual performance in glare. (arvojournals.org)
  • The effects described, therefore, can be extended more confidently to real-world, practical visual performance benefits. (arvojournals.org)
  • Because the fovea yields the highest visual performance for nearly all parameters of vision, any factor that negatively impacts its function (i.e., glare) will result in noticeable decrements in visual performance. (arvojournals.org)
  • Conversely, any factor that promotes or protects foveal function would seemingly have noticeable visual performance benefits. (arvojournals.org)
  • receptor type
  • Physiological illusions arise in the eye or the visual pathway, e.g. from the effects of excessive stimulation of a specific receptor type. (wikipedia.org)
  • cues
  • Loss of these cues along with other environmental consequences discussed below can degrade perception of object shape, distance, location and relative motion. (nasa.gov)
  • macular degeneration
  • The purpose of this study was to evaluate the impact of supplemental macular carotenoids (including versus not including meso -zeaxanthin) in combination with coantioxidants on visual function in patients with nonadvanced age-related macular degeneration. (arvojournals.org)
  • Antioxidant supplementation in patients with nonadvanced age-related macular degeneration results in significant increases in macular pigment and improvements in CS and other measures of visual function. (arvojournals.org)
  • discrimination
  • An apparatus for quantitative assessment of visual form discrimination of a subject comprising a display device, an input device, a control device, and a tangible computer readable medium. (patentsencyclopedia.com)
  • stimulation
  • The negative safety implications of the elaborate interior lighting features would appear to be minimal in terms of distraction and irritation whereas the safety benefits in this particularly long road tunnel, in terms of subjective feelings of visual stimulation is encouraging. (hcibib.org)
  • difficulty
  • 3) Optic ataxia ( ataktos , Greek for "disorderly"): difficulty reaching under visual guidance despite normal limb strength. (bmj.com)
  • affect
  • The lighting of objects at a point, the reflectance of those objects and the transmittance of media between the object and observer is central to determining the primary factors that affect our visual perception. (wikipedia.org)
  • system
  • Moreover, other brain functions that rely on transient information processed by the visual system may also be jeopardized. (jneurosci.org)
  • human
  • These visual illusions are of particular interest to researchers because they may provide valuable insights in regard to the workings of human visual systems. (wikipedia.org)
  • Diagnostic
  • The importance of sensory symptoms is highlighted by their recent inclusion in the Diagnostic and Statistical Manual of Mental Disorders ( American Psychiatric Association, 2013 ). (frontiersin.org)
  • known
  • Cognitive visual illusions are the result of unconscious inferences and are perhaps those most widely known. (wikipedia.org)