ERG by Localised Sinusoidal Stimulation

Grounauer, P. A.; Toi, Vo Van; Huber, C.

doi:10.1007/978-94-009-9180-4_28

Cited by 3 publications

(4 citation statements)

References 3 publications

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“…the whole retina. Many authors have studied the possibility of stimulation of a localised area [22][23][24][25][26][27][28] with variable success. Obviously, localised stimulation is not possible in patients with dense vitreous clouding.…”

Section: Discussionmentioning

confidence: 99%

“…Results from some of the studies on localised stimulation indicate that a considerable part of the photopic Ganzfeld response is determined by the central part of the retina [22,23,28]. In fact authors state that 'the change of response amplitude with eccentricity was probably too large to be attributed to the count of the number of cones combined with the Stiles Crawford effect' [23].…”

Section: Discussionmentioning

confidence: 99%

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Analysis of the electroretinogram in toxoplasma retinochorioiditis

et al. 1992

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The decision to use therapy in toxoplasma retinochorioiditis depends on the location of the active lesion and the presence of vitreous activity. In eyes with dense vitreous clouding it can be difficult to see whether the macular region is involved or not. In theory the localisation of a lesion can be estimated on the basis of the flash ERG. The standard flash electroretinogram was recorded in 23 patients with inactive toxoplasma retinochorioiditis lesions in the retina. In 17 cases a lesion was present within the central 12 degrees of the visual field, 8 of these had a reduced photopic ERG. In 15 patients lesions were found outside the central 12 degrees, in 8 of whom the scotopic ERG was reduced. We conclude that the ERG can be of use in indicating the scar location in patients with dense vitreous clouding.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Analysis of the electroretinogram in toxoplasma retinochorioiditis

et al. 1992

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“…The prospects of using a local macular ERG (L-ERG) clinically have been noted since 1962 [1][2][3][4][5][6][7][8][9][10][11]. However, no standard technique for recording a macular ERG has been available until recently (10)(11)(12)(13)(14).…”

Section: Introductionmentioning

confidence: 99%

“…However, no standard technique for recording a macular ERG has been available until recently (10)(11)(12)(13)(14). Researchers have had to use various physiologic properties of the rod and cone systems as well as the background illumination to inhibit the functioning of the rods [6,7,[15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Local ERG for clinical examination of eye diseases

Shamshinova

1990

Doc Ophthalmol

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We used a suction electrode with a frosted front window to record a full-field (general) ERG, and a suction electrode with a short-focus lens and a red-green light diode to record a local ERG. As the suction electrode moved with the eye, the stimulus struck the macula in all positions of gaze. Our data showed that only mildly intense stimuli with an angular size of 10 to 15 degrees induced a retinal response, with a macular contribution of 70%. Patients with various dystrophic changes of the retina, such as Stargardt's dystrophy, vitelliform dystrophy of the Best type, X-linked juvenile retinoschisis, and age-related macular dystrophy of different stages, were examined. In patients with retinitis pigmentosa, the cones were involved in the pathologic process to varying degrees; the behavior of the local ERGs helped determine the final visual acuity. We also observed a reduction in the local ERG in patients with Stargardt's dystrophy that disappeared as the disease progressed. In age-related macular dystrophy, a disturbance of the electrogenesis mainly occurred in the central retina in advanced stages of the disease.

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Lissajous figures and visual electrograms by colored modulated stimulation

Albuisson

Alfieri

Boire

Images of the Twenty-First Century. Proceedings of the Annual International Engineering in Medicine and Biology Society

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e c t r o d e s and w i t h averaging ( a n a l y s i s t i m e : 0.6 sec ; number o f sweeps : 100). Results. Four i e r s e r i e s a n a l y s i s showed t h e r e d t o be slower t h a n t h e b l u e u s i n g s t i m u l a t i o n a t [ 5 Hz, 60'1 . T h i s r e s u l t was reversed a t b o t h [ 2 0 Hz, 60"l and [ 5 Hz, 6'1 case where t h e cent r a l r e t i n a i s p u t a t a l e s s e r disadvantage.

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ERG by Localised Sinusoidal Stimulation

Cited by 3 publications

References 3 publications

Analysis of the electroretinogram in toxoplasma retinochorioiditis

Analysis of the electroretinogram in toxoplasma retinochorioiditis

Local ERG for clinical examination of eye diseases

Lissajous figures and visual electrograms by colored modulated stimulation

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