+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Relationships between the electroretinogram a-wave, b-wave and oscillatory potentials and their application to clinical diagnosis

, : Relationships between the electroretinogram a-wave, b-wave and oscillatory potentials and their application to clinical diagnosis. Documenta Ophthalmologica. Advances in Ophthalmology 79(2): 125-139

The electroretinogram is the electrical response of the retina to a light stimulus. The amplitude and temporal pattern of its components, the a-wave, the b-wave and the oscillatory potentials, depend on the functional integrity of the retina, on the intensity of test flash reaching the retina and on the ambient illumination. The latter contributions to the normal variability in the electroretinogram can be circumvented by constructing the relationships between the different electroretinogram waves. The electroretinogram responses were recorded from 18 dark-adapted subjects with normal vision. The slope of the a-wave and the amplitude of the b-waves were measured in the time domain. The oscillatory potentials were isolated by a digital filter and were transformed to the frequency domain for quantitative measurement. The relationship between each pair of variables could be fitted by linear segments. Our findings suggest that this mode of electroretinogram analysis can be useful in localizing the site of action of retinal disorders and that the relationship between the a-wave slope and the power density of the oscillatory potentials is a useful index for identifying disorders of the inner retina.


PMID: 1591967

Other references

Taute, B-Maria.; Gläser, C.; Taute, R.; Podhaisky, H., 2002: Progression of atherosclerosis in patients with peripheral arterial disease as a function of angiotensin-converting enzyme gene insertion/deletion polymorphism. Angiotensin-converting enzyme insertion/deletion (I/D) gene polymorphism plays a role in determining the inter-individual variability of circulating angiotensin-converting enzyme activity and intracellular angiotensin-converting enzyme levels. Ang...

Rosch, K.S.; Mostofsky, S.H., 2015: Increased Delay Discounting on a Novel Real-Time Task among Girls, but not Boys, with ADHD. The aim of this study was to examine delay discounting in girls and boys with ADHD-Combined type (ADHD-C) relative to typically developing (TD) children on two tasks that differ in the extent to which the rewards and delays were experienced by par...

Kieferle, F.; Dusch, F.; Hindemith, L., 1932: Dried yeast as supplementary food for dairy cows. 4. Influence of feeding dried yeast upon the content of the milk in total sterols and in accessory food factors. Total sterols (digitonin method) ranged from 10.4 to 15.3 mg. per 100 c.c. with average 12.7 mg. Average figure slightly higher for the yeast-fed group, rising somewhat with the fat as lactation advanced. As determined by rat feeding, vitamin D co...

Opienska-Blauth, J.; Sanecka, M.; Charezinski, M., 1960: Sensitivity of the fluorescence test for amino acids. The method of detecting amino acids on filter paper by their fluorescence in ultraviolet light after being heated at 100 degrees to 120 degrees C is in general less sensitive than the ninhydrin test. Except for asparagine, lysine and tryptophan, i...

Hurley, R.M.; Musiek, F.E., 1994: Effectiveness of transient-evoked otoacoustic emissions (TEOAEs) in predicting hearing level. The purpose of the present investigation was to (1) determine the short-term test-retest reliability of the transient-evoked otoacoustic emission (TEOAE) parameters of echo level and reproducibility, as produced by the Otodynamic's ILO88 syst...

Schipske, G., 1987: Case management: a powerful new marketing tool. Caring 6(12): 8-10

Blagoderov, AI., 1993: Seasonal distribution and some biological peculiarities of the salmon shark, Lamna ditropis, in the northeastern part of the Pacific Ocean. Voprosy Ikhtiologii. Sentyabr'-Oktyabr'; 335: 715-719

Hayes R.L.; Koslow M.; Hiesiger E.M.; Moore E.; Pierz D.; Ransohoff J., 1992: Regional eosinophilia correlates with clinical response to il 2 lak cell therapy in primary brain tumors. Journal of Cellular Biochemistry Supplement (16 PART B): 316

Wang, Q.; Zhou, Y.; Chen, K.; Ju, X., 2016: Suppression of Bm-Caspase-1 Expression in BmN Cells Enhances Recombinant Protein Production in a Baculovirus Expression Vector System. Baculovirus expression vector systems (BEVSs) have been widely used for recombinant protein production. Many studies have tried to improve the recombinant protein production by either modification of BEVSs vectors or by cell line selection. In thi...

Baba, S.; Osakabe, N.; Natsume, M.; Muto, Y.; Takizawa, T.; Terao, J., 2001: In vivo comparison of the bioavailability of (+)-catechin, (-)-epicatechin and their mixture in orally administered rats. We compared levels of (+)-catechin, (-)-epicatechin, and their metabolites in rat plasma and urine after oral administration. Rats were divided into four groups and given (+)-catechin (CA group), (-)-epicatechin (EC group), a mixture of the two (M...