Aetiology of varicosity.

Patterns of Epidural Venous Varicosity in Lumbar Stenosis

OBJECTIVE Epidural venous varicosity (congestion of the epidural vein) is rarely introduced as an influential factor of clinical symptoms. However, there are several studies suggesting that epidural venous varicosity results in neurologic symptoms. We would like to highlight evidence that epidural venous varicosity results in neurologic symptoms and the relation between epidural venous varicosi...

Observations on the natural history of varicosity of pulmonary veins.

pREVIOUS reports have alluded to the rarity of varicosities of the pulmonary veins. To date, only 18 cases exist in the literature. Six were diagnosed at autopsyl-6 and the rest by radiological methods.7 '5 Little is known about the course and outcome of pulmonary venous varices. The present communication is a report of three cases. In one patient, the lesion enlarged in 7 years with progressio...

A review on aetiology and pathogeny of African horse sickness

Axonal Varicosity Density as an Index of Local Neuronal Interactions

Diffuse transmission is an important non-synaptic communication mode in the cerebral neocortex, in which neurotransmitters released from en passant varicosities interact with surrounding cells. In a previous study we have shown that the cholinergic axonal segments which were in the microproximity with dopaminergic fibers possessed a greater density of en passant varicosities compared to more di...

Polarity of varicosity initiation in central neuron mechanosensation

Little is known about mechanical regulation of morphological and functional polarity of central neurons. In this study, we report that mechanical stress specifically induces varicosities in the axons but not the dendrites of central neurons by activating TRPV4, a Ca2+/Na+-permeable mechanosensitive channel. This process is unexpectedly rapid and reversible, consistent with the formation of axon...