CorticalContrast sensitivity and color visionAcuityEvoked potentialsStimuliGlareSensoryColourAbnormalitiesAuditoryDeficitsNeuralNeurologicalPerceptualDiagnosisAcuteStructural lesionsCortexTemporalOpticOnsetAutisticPatientsRecognitionMechanismsSuggestsFindingsPatternsExaminationRevealsConsistentLightColorGroupSevereClinicalDeficitStudyReportFieldFunctionMovementsSearchRangeFound
Cortical7
- Motion perception is an important visual function and occurs from the earliest stages of cortical visual processing, with individual neurons being tuned to a preferred direction of motion. (wikipedia.org)
- 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)
- Precision-Tinted Spectral Filters Reduce TBI-Related Migraines and visual cortical sensitivity. (irlen.com)
- The latter is manifested in hypersensitivity to visual stimuli, measured with questionnaires and sensory thresholds, as well as in abnormal cortical excitability and a lack of habituation, assessed with visual evoked potentials elicited by pattern-reversal stimulation. (biomedcentral.com)
- Here, the goal was to determine whether factors such as age and/or disease severity may exert a modulatory influence on sensory sensitivity, cortical excitability, and habituation. (biomedcentral.com)
- The results of this study yielded evidence for significant hypersensitivity in patients but no significant differences in either habituation or cortical excitability, as compared to headache-free controls. (biomedcentral.com)
- Evidence for a similar cortical specialization in humans has come from epilepsy patients with implanted subdural electrodes. (jneurosci.org)
Contrast sensitivity and color vision1
- Abnormal contrast sensitivity and color vision are present in almost all adults with ON even in the absence of a measurable decrease in visual acuity. (medscape.com)
Acuity5
- Visual evoked potentials may be abnormal even when visual acuity is normal and when MRI of the optic nerve reveals no abnormalities. (medscape.com)
- In the current study, unisensory temporal acuity was measured by determining individual thresholds on visual and auditory temporal order judgment (TOJ) tasks, and multisensory temporal function was assessed through a cross-modal version of the TOJ task. (frontiersin.org)
- A gradual recovery of visual acuity with time is characteristic of ON,[22] although permanent residual deficits in color vision and contrast and brightness sensitivity are common. (medscape.com)
- There were no differences in visual acuity or colour vision up to 6 months after surgery, but the blue-light filtered eyes scored better in contrast sensitivity at select frequencies. (drcremers.com)
- On the other hand, a comparison of another IOL (AcrySof Natural IOL, Alcon), which filters blue light, to single-piece IOLs (single-piece AcrySof IOL, Alcon), which filter only UV light, showed no difference between them in visual acuity, contrast sensitivity, or colour perception among the 93 patients implanted with one or the other. (drcremers.com)
Evoked potentials4
- We obtained pattern-reversal visual evoked potentials and calculated the N1-P1 Peak-to-Peak amplitude. (biomedcentral.com)
- Visual evoked potentials (VEPs) can be considered in patients in whom a diagnosis of ON is suspected. (medscape.com)
- Visual evoked potentials often show a loss of P100 response in the acute phase. (medscape.com)
- Visual evoked potentials (VEPs) are an important means of evaluating patients with suspected ON. (medscape.com)
Stimuli6
- Contrast is a feature of visual stimuli that characterizes the difference in brightness between dark and light regions of an image. (wikipedia.org)
- Perception of contrast is affected by the temporal frequency and spatial frequency properties of a stimulus, and the sensitivity to contrast in sine wave stimuli is characterized by the contrast sensitivity function. (wikipedia.org)
- medical citation needed] Results from pharmacological studies in cats have demonstrated the role of NMDA in contrast perception of magnocellular-tuned stimuli. (wikipedia.org)
- Although evidence for deficits in sensory (and multisensory) processing is abundant in the ASD literature, there are also a number of reports detailing enhanced perceptual capabilities in response to specific sensory stimuli. (frontiersin.org)
- ANOVA results revealed that only the music training group showed a significant improvement in detection of audio-visual temporal discrepancies compared to the other groups for both stimuli (flash-beep and face-voice). (nature.com)
- Auditory, visual, and somatosensory stimuli as well as the acts of writing, reading, eating, and decision making are examples of events or activities that may induce seizure activity in affected individuals. (lookformedical.com)
Glare1
- Blue light is scattered more than light of longer wavelengths, Li and colleagues wrote, and blue light scatter is the predominant cause of veiling luminance and glare disability. (drcremers.com)
Sensory7
- Effect of Induced Visual Fatigue on Sensory Ocular Dominance and the Effect of Colored Filters on the Levels of Visual Fatigue in Dyslexic Adults with MIS. (irlen.com)
- Sensory sensitivity was assessed with the Sensory Perception Quotient and group comparisons were carried out. (biomedcentral.com)
- In both experiments, patients reported increased visual hypersensitivity on the Sensory Perception Quotient as compared to controls. (biomedcentral.com)
- One of the questionnaires used to assess sensory sensitivity is the Sensory Perception Quotient (SPQ), which evaluates a variety of visual parameters and has been used in both healthy and clinical populations [ 16 ]. (biomedcentral.com)
- Reports of abnormal sensory function that span the visual, auditory, gustatory, and tactile domains reinforce the "multisensory" nature of sensory processing alterations in ASD (for review, see Rogers and Ozonoff, 2005 ), and emerging evidence suggests that abnormalities also extend to the selective integration of information across the different sensory modalities (i.e., multisensory integration - see Iarocci and McDonald, 2006 ). (frontiersin.org)
- Visual motion drives smooth pursuit eye movements through a sensory-motor decoder that uses multiple parallel neural pathways to transform the population response in extrastriate area MT into movement. (bvsalud.org)
- Posterior portion of the CEREBRAL HEMISPHERES responsible for processing visual sensory information. (lookformedical.com)
Colour1
- The uses of colour in optometric practice to ameliorate symptoms of visual stress. (irlen.com)
Abnormalities4
- Visual processing abnormalities in schizophrenia are commonly found, and contribute to poor social function. (wikipedia.org)
- The specificity of many visual processing abnormalities in schizophrenia is still an area of active debate within the scientific community. (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)
- Visual attention-based approach for prediction of abnormalities in CCTV video surveillance. (ntu.ac.uk)
Auditory2
- Whereas no differences in thresholds for the visual TOJ task were seen between children with ASD and TD, thresholds were higher in ASD on the auditory TOJ task, providing preliminary evidence for impairment in auditory temporal processing. (frontiersin.org)
- For example, learning to play the piano requires intensive coupling of the visual cues (reading the music scores and monitoring the finger movements) with the auditory cues (the sounds that the piano makes), which results in a multisensory training that can benefit audio-visual processing and enhance the ability to use this information. (nature.com)
Deficits1
- [ 1 ] although permanent residual deficits in color vision and contrast and brightness sensitivity are common. (medscape.com)
Neural3
- 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 people 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)
- Thus, several sources of evidence support the existence of specialized neural "modules" for face perception in extrastriate cortex. (jneurosci.org)
Neurological1
- There was no ocular pain on eye movement, headache, or other neurological symptoms. (biomedcentral.com)
Perceptual3
- Further, the magnitude of this perceptual suppression effect has been shown to correlate with the concentration of GABA (γ-aminobutyric acid), an inhibitory neurotransmitter, in the visual cortex. (wikipedia.org)
- Inhibition of motion perception by the addition of a surround stimulus has also been examined in schizophrenia, with one group finding evidence both of impaired motion perception and weaker perceptual suppression effects in schizophrenia. (wikipedia.org)
- Visual-perceptual difficulties and the impact on children's learning: are teachers missing the page? (irlen.com)
Diagnosis2
- Furthermore, aside from the presence of ictal photophobia as a criterion for the diagnosis of migraine [ 5 ] visual alterations have also been reported interictally. (biomedcentral.com)
- Retrospective studies in multiple nations have shown delays of greater than 5 years between the onset of symptoms and the correct diagnosis ( 3 - 6 ). (frontiersin.org)
Acute1
- 18,19] Photophobia is one the most common symptoms in both acute and chronic phases of concussion. (researchgate.net)
Structural lesions1
- Patients presented with visual field loss or cranial neuropathies require evaluation for structural lesions. (researchgate.net)
Cortex1
- The electric response evoked in the cerebral cortex by visual stimulation or stimulation of the visual pathways. (lookformedical.com)
Temporal2
- Music involves different senses and is emotional in nature, and musicians show enhanced detection of audio-visual temporal discrepancies and emotion recognition compared to non-musicians. (nature.com)
- Measures of audio-visual temporal discrepancy, facial expression recognition, autistic traits, depression, anxiety, stress and mood were completed and compared from the beginning to end of training. (nature.com)
Optic1
- Examination revealed that he only had perception to light in both eyes, associated with optic atrophy on funduscopy. (biomedcentral.com)
Onset2
- Visual function begins to improve 1 to several weeks after onset, even without any treatment. (medscape.com)
- The left eye was affected within 3 months of the onset of the right eye visual loss. (biomedcentral.com)
Autistic1
- Light sensitivity and some pervasive developmental disorders: autistic disorder, Asperger's disorder. (irlen.com)
Patients1
- In addition, patients are often initially treated with antidepressants or stimulants ( 5 , 9 - 11 ), which can lead to exacerbation of symptoms, manic episodes, and a worsening of the course of the illness. (frontiersin.org)
Recognition1
- There is evidence that schizophrenia affects perception of contrast and motion, control of eye movements, detection of visual contours, and recognition of faces or facial expressions. (wikipedia.org)
Mechanisms1
- Individual model components are based on psychophysically uncovered mechanisms of visual attention and saccadic decision-making. (bvsalud.org)
Suggests1
- Increasing evidence suggests, however, that visual attention does not select locations with high saliency but operates on attentional units given by the objects in the scene. (bvsalud.org)
Findings1
- Herein, a family cohort all with bipolar disorder is described and their symptoms correlated with findings on the individual SPECT brain scans. (frontiersin.org)
Patterns1
- Investigative technique commonly used during ELECTROENCEPHALOGRAPHY in which a series of bright light flashes or visual patterns are used to elicit brain activity. (lookformedical.com)
Examination1
- Purpose of Review Concussion frequently results in visual symptoms, necessitating careful neuro-ophthalmic examination. (researchgate.net)
Reveals1
- Brain perfusion single photon emission computed tomography (SPECT) neuroimaging reveals visual correlates of brain function. (frontiersin.org)
Consistent1
- However, another recent report has disputed this finding, instead showing evidence consistent with stronger surround influence on motion perception in schizophrenia. (wikipedia.org)
Light4
- While light therapy applied in the daytime is known to have anti-depressive properties, excessive light exposure at night has been reportedly associated with depressive symptoms. (researchgate.net)
- Only weak evidence supports the use of IOLs that filter visible blue light, researchers say. (drcremers.com)
- On the basis of currently available evidence, one cannot advocate for the use of blue-light-filtering IOLs over UV-only filtering IOLs," wroite X. Li, Waterford Institute of Technology, Waterford, Ireland, and colleagues. (drcremers.com)
- reasoned the finding may simply reflect better preoperative contrast sensitivity in the eyes scheduled to be implanted with the blue-light-filtering IOL. (drcremers.com)
Color1
- Initially, he had noted a dark spot in the center of his right visual field with color desaturation in the periphery that gradually progressed. (biomedcentral.com)
Group1
- This study did not measure or report contrast sensitivity preoperatively in either group, so Li et. (drcremers.com)
Severe2
- There is evidence that these impairments may be more severe among people with predominantly negative symptoms, or those who are not medicated. (wikipedia.org)
- Optical coherence tomography (OCT), done at 5 months of vision loss development, showed evidence of bilateral severe ganglion cell loss with macular thinning. (biomedcentral.com)
Clinical1
- The present review focuses on the pathophysiology, clinical presentations, examinations, management, and future directions regarding visual disturbances after concussion. (researchgate.net)
Deficit2
- Butler and colleagues[medical citation needed] have proposed that people with schizophrenia may have a specific deficit in the magnocellular visual processing pathway, and electroencephalography (EEG) data have been presented that may support this view. (wikipedia.org)
- Skottun and colleagues dispute the magnocellular deficit theory however, saying that there is not enough evidence from different research groups to support it, and that the experiments focused on this topic have shown very mixed results. (wikipedia.org)
Study1
- This RCT study provides the first evidence of a causal effect of music training on improved audio-visual perception that goes beyond the music domain. (nature.com)
Report1
- Visual stress symptoms secondary to stroke alleviated with spectral filters and precision tinted ophthalmic lenses: a case report. (irlen.com)
Field1
- Smooth pursuit on the other hand, allows the viewer to track a moving object along its trajectory within the visual field. (wikipedia.org)
Function1
- Our data allow us to reject alternative accounts of the function of the fusiform face area (area "FF") that appeal to visual attention, subordinate-level classification, or general processing of any animate or human forms, demonstrating that this region is selectively involved in the perception of faces. (jneurosci.org)
Movements2
- Eye movements are important behaviors for locating and tracking objects in the visual world. (wikipedia.org)
- The successful decoder reproduces the measured eye movements by multiplication of 1) the estimate of target speed from the peak of the population response with 2) visual-motor gain based on the amplitude of the population response. (bvsalud.org)
Search2
- Use of visual search in the assessment of pattern-related visual stress (PRVS) and its alleviation by colored filters. (irlen.com)
- pixolution's visual search technology is used by many image agencies. (mmm2023.no)
Range1
- Hypothetically, increasing macular pigment would improve contrast between a background consisting of blue haze and a target, thereby increasing visual range and improving discernibiltiy of a target's low-contrast internal details. (drcremers.com)
Found1
- 8 , 17 found that pianists and drummers have significantly narrower ASW for audio-visual piano and drumming clips respectively. (nature.com)