Adam Christian Thebesius, a historical perspective.

The Silesian physician Adam Christian Thebesius (1686-1732) was one of the most renowned scientists studying the coronary circulation and its pathologies in the eighteenth century. His groundbreaking work opened the field of coronary microcirculation for generations of scientists to come. In 1708, Thebesius published his anatomical thesis, "Disputatio medica inauguralis de circulo sanguinis in corde", describing the cardiac veins that emptied into chambers of the heart, the vasa cordis minima.

Control of rod retinomotor movements in teleost retinae: the role of dopamine in mediating light-dependent and circadian signals.

In the retinae of lower vertebrates, several morphological changes, including photomechanical movements of rods, cones and pigment epithelium, occur during light and dark adaptation. We studied the contribution of exogenous and endogenous circadian control mechanisms to rod retinomotor movements in the teleost retina and their dependence on an intact dopaminergic system. Blue acara (Aequidens pulcher) were kept under a 12:12 h light/dark cycle.

[MALT lymphoma of the ileum as the cause of an enterocolic invagination].

History And Findings: A 44-year-old woman who had moved to Germany from Kazakhstan 2 years previously developed right upper abdominal pain. A cylindrical mass was palpable in the area. There were strong intestinal sounds.

Activation of cultured rat hypothalamic dopaminergic neurons by long-term but not short-term treatment with prolactin.

Pituitary prolactin (PRL) secretion is inhibited by hypothalamic GABAergic and dopaminergic (DAergic) systems. PRL, in turn, appears to be capable of activating these neurons, thus, providing for a negative feedback regulation. We have recently shown that cultured hypothalamic GABAergic- but not DAergic neurons respond to PRL with a rapid increase in intracellular free calcium.

Modulation of endogenous dopamine release in the turtle retina: effects of light, calcium, and neurotransmitters.

In the turtle retina, dopamine has been observed in a small population of amacrine cells. Whereas the effect of dopamine has been intensively studied, knowledge about the release of this transmitter and the neuronal control of its release are still poorly understood. We therefore decided to study the release of endogenous dopamine.