What Are the Symptoms of Bird Flu in Humans? Bird flu symptoms in people can vary. Symptoms may start out as normal flu-like symptoms. This can worsen to become a severe respiratory disease that can be fatal. In February 2005, researchers in Vietnam reported human cases of bird flu in which the virus infected the brain and digestive tract of two children. Both died. These cases make it clear that bird flu in humans may not always look like typical cases of flu.
Pericyte, Astrocyte and Basal Lamina Association with the Blood Brain Barrier (BBB). The periendothelial accessory structures of the BBB include pericytes, astrocytes, and a basal membrane. The endothelial cells of the BBB are distributed along the length of the vessel and completely encircles the lumen. A thin basement membrane (i.e. basal lamina) supports the ablumenal surface of the endothelium.
Astrocytes comprise some 90% of all human brain cells, but because they lack the electrical activity of neurons, they were never really considered to participate in the process of long-term potentiation -- changes in synaptic strength thought to underlie learning and memory.he effect appeared to be localized, with synapses just 200 micrometers away from clamped astrocytes exhibiting normal LTP formation. But astrocytes extend only about 50 to 70 micrometers, Volterra said, suggesting that the effect was not entirely contained within the reach of the manipulated astrocyte.