Evoked potentials in clinical medicine , Evoked potentials in clinical medicine , کتابخانه مرکزی دانشگاه علوم پزشکی ایران

Evoked Potentials in Clinical Medicine

Normal and anomalous development of visual motion processing: motion coherence and 'dorsal-stream vulnerability'.

Neural bases of visual deficits during aging.

Spatial frequency sweep VEP: visual acuity during the first year of life.

In this chapter we summarize the growing literature on the optical , anatomical, physiological, and behavioral development of vision in human and nonhuman primates. The literature in this area is new and diverse, and to our knowledge it has not been previously reviewed as a whole . Emphasis is on postnatal development, in both its normal and its most common abnormal forms. All monkeys in the studies reviewed were Old World monkeys . References to the large body o f developmental studies o n nonprimate spe­ cies have been omitted (for reviews see Grobstein & Chow 1976, Tees 1976, Movshon & Van Sluyters 1981, Sherman & Spear 1982, Mitchell & Timney 1984). We have also omitted a large body of literature on embryology and prenatal anatomical development (see Rakic & Goldman-Rakic 1982, van Hof-van Duin & Mohn 1984). Of necessity, extended discussions of theoretical issues are precluded. Extended works on the topic of visual development can be found in Banks & Salapatek (1983), Aslin et al (1981), and the October 1983 issue of Behavioural Brain Research. A major reason for studying the development of vision in monkeys is to establish and use the monkey as a model for studying normal and abnormal human visual development. Many of the behavioral and anatomical studies reviewed below suggest major similarities of development, with rough parity at birth, and development proceeding about four times faster in Old World monkey infants than in human infants. To emphasize this 4: 1 conversion factor

Postnatal Development of Vision in Human and Nonhuman Primates

Age-related changes in the latency of the visual evoked potential: Influences of check size ☆

Developmental changes in the human visual system as reflected by the latency of the pattern reversal VEP

In order to determine the optimum stimulus conditions for the detection of optic nerve damage due to glaucoma and ocular hypertension, checkerboard pattern reversal visual evoked potentials (VEPs) were recorded from 20 glaucoma patients, 20 ocular hypertensive patients, and 20 age-matched normals. Two check sizes (12' and 48'), two field sizes (14 degrees and 28 degrees), and two alternation rates (1.9 and 7.5 alt/sec) were used. All subjects had visual acuities of 20/40 or better in each eye and equal pupils of 2 to 5 mm diameter. The largest number of VEP abnormalities were found with large checks (48') reversing at a fast rate (7.5 alt/sec). After correcting for the effects of age, visual acuity, and pupil size, 16 of 30 eyes with glaucomatous visual field defects had abnormally long VEP latencies under this condition (beyond the 99% confidence limit of the normal subjects). Nine of 40 ocular hypertensive eyes also had abnormally long latencies. Increased pattern VEP latency was significantly correlated with both the severity and location of visual field defects and the degree of cupping and pallor of the optic disc. VEP latency was not significantly related to intraocular pressure.

Anne Moskowitz

Papers

Age-related changes in the latency of the visual evoked potential: Influences of check size ☆

Developmental changes in the human visual system as reflected by the latency of the pattern reversal VEP

The visual evoked potential in glaucoma and ocular hypertension: effects of check size, field size, and stimulation rate.

Effect of retinal blur on the peak latency of the pattern evoked potential.

Evoked potential and preferential looking estimates of visual acuity in pediatric patients.