Brain complexity: essay on the complexity (Introduction)

by David Turell , Thursday, March 24, 2016, 14:50 (3166 days ago) @ dhw


> dhw: 1.	Where Do Stem Cells Come From? Somatic vs Embryonic
> http://lymphoma.about.com › Leukemia and Lymphoma Treatment/f
> 
> (This may not give the right link, but I don't know how else to do it.)
> 
> QUOTE: “…adult stem cells have been found in many organs and tissues, including brain, bone marrow, peripheral blood, blood vessels, skeletal muscle, skin, teeth, heart, gut, liver, ovarian cells, and testis.” -Website offers no clue to your point. Sorry. Quote is correct.-> 
> dhw: Without going into technical details, and bearing in mind that nobody knows how the process actually works, could you just tell me if you think it feasible that innovations come about physically by means of interaction (no matter whether preprogrammed or autonomous) between neurons and stem cells, with their ability to take on different forms and functions?-Good question. My view is that all cells that can produce an action are programmed to respond to stimuli. A lining cell in a blood vessel is not such a cell. A neuron can make many changes to its function depending upon demands it receives. A stem cell makes functional cells as required. I have no idea how they would independently cooperate to invent something new. I believe in top down, not bottom up controls.