[Fatal child neglect in East Germany 1 January 1985 to 2 October 1990. Results of a multicenter study].

Unlabelled: No reliable data are available on cases of lethal child neglect in the area of the former German Democratic Republic. In a multicenter study we therefore examined the police and court records for such cases occurring in the period 1 January 1985 to 2 October 1990 in the entire area of the former German Democratic Republic.

Results: A total of 9 cases were reported to the study center.

[Lethal child abuse (through the use of physical force) in the German Democratic Republic during the period 1 January 1985 to 2 October 1990. Results of a multicenter study].

Unlabelled: No reliable data are available on cases of lethal child abuse (by active force) in the area of the former German Democratic Republic. In a multicenter study we therefore examined the police and court records for such cases occurring in the period 1 January 1985 to 2 October 1990 in the entire area of the former German Democratic Republic.

Results: The study center received information on 39 cases of lethal child abuse which correspond to approximately 7 cases per year.

The influence of MgCl2 and APB on the light-induced potassium changes and the ERG b-wave of the isolated superfused rat retina.

The ERG and the extracellular potassium concentration, [K+]o, of the isolated superfused rat retina were measured in a physiological solution and in solutions containing 10 mM MgCl2 or 100 mu M APB. MgCl2 nearly abolished the b-wave, but the light-induced distal [K+]o increase was enlarged from 0.13 +/- 0.

The c-wave of the electroretinogram possesses a third component from the proximal retina.

ERG and light-induced extracellular potassium ([K+]o) changes have been measured in isolated retinas of both Rana esculenta and Rana temporaria. The conditions of the preparations have been varied. Isolated frog retinas kept receptor side-upward in a moist chamber without perfusion showed the well-known slow PIII in the ERG.

The neural retina of the frog contributes a slow cornea-positive potential to the electroretinogram.

A c-wave-like cornea-positive potential in the isolated rabbit retina has been described. In this study, frog retinas were investigated to see if the neural retina contributes a slow cornea-positive component to the c-wave of the electroretinogram. The eye cups of both Rana esculenta and Rana temporaria exhibited a normal electroretinogram with c-wave, a larger proximal light-induced extracellular potassium increase, a small distal extracellular potassium increase and an extracellular potassium decrease around photoreceptors.