THE PATTERN VISUAL EVOKED CORTICAL RESPONSE IN HUMAN AGEING
نویسندگان
چکیده
منابع مشابه
Visual Evoked Cortical Response in the Cat.
The cortical response of the cat to light fashes has been studied, the locus of greatest amplitude of response noted, and the conformation described. Recordings through the dura indicate that there is diminution of the response amplitude and reduction of localization caused by the dura. The effects of stimulus parameter changesy of application of strychnine locally, and of intravenous pentobarb...
متن کاملVisual function and pattern visual evoked response in optic neuritis.
The disparity between clinical visual function and pattern visual evoked response (VER) was studied in 53 patients who had suffered an attack of optic neuritis (ON) more than six months before. The visual functions tested included Snellen visual acuity, colour vision, visual field, and contrast sensitivity. The effect of pattern presentation, check size, and luminance was tested by recording VE...
متن کاملPupil size and the pattern evoked visual response.
The effect of artificially varying the pupil size upon the pattern evoked visual response was examined in six healthy subjects and six patients with multiple sclerosis who had abnormal visual evoked responses. Slight depression of amplitude was seen whether the pupil was small or large, but the most obvious effect was a reduction of latency with a large pupil and an increase of latency with a s...
متن کاملPattern shift visual evoked response: application in neurology.
The technique that we use for pattern shift visual evoked response (PSVER) is described. PSVER is a non-invasive, practical and reliable clinical test in detecting anterior visual pathways lesions even when asymptomatic. The ability to find unsuspected lesions in multiple sclerosis, making possible an early diagnosis, is underscored. We also discuss some pathophysiologic aspects and the finding...
متن کاملReactivation of visual-evoked activity in human cortical networks.
In the absence of sensory input, neuronal networks are far from being silent. Whether spontaneous changes in ongoing activity reflect previous sensory experience or stochastic fluctuations in brain activity is not well understood. Here we demonstrate reactivation of stimulus-evoked activity that is distributed across large areas in the human brain. We performed simultaneous electrocorticography...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Quarterly Journal of Experimental Physiology
سال: 1989
ISSN: 0144-8757
DOI: 10.1113/expphysiol.1989.sp003274