Zitat des Tages über Neuronen / Neurons:
The fact that three-fifths of an octopus' neurons are not in their brain, but in their arms, suggests that each arm has a mind of its own.
We have found that fusions of GFP with the RING finger domains of certain E3 ubiquitin ligases creates an unstable GFP. We have used unstable GFP to learn how disruption of microtubules in the touch receptor neurons causes a generalized reduction in protein levels in the cells.
Brain cells are normally not sensitive to light. So by introducing light-sensitive proteins into specific types of neurons, we can now selectively control that specific type of neuron by shining light in the brain.
Synaptic summation is the technical term used in neurophysiology for those instances in which some neuron C is fired only by a combination of neurons A and B.
The identification of a population of olfactory sensory neurons innervating a single glomerulus that mediates robust avoidance to a naturally occurring odorant provides insight in the neural circuitry that underlies this innate behavior.
Octopuses have hundreds of suckers, each one equipped with its own ganglion with thousands of neurons. These 'mini-brains' are interconnected, making for a widely distributed nervous system. That is why a severed octopus arm may crawl on its own and even pick up food.
I think my characters with my fingers, I think my characters with my guts. But when I say I think them, that is what I do, I feel them with the sympathetic neurons and I work out with my brain what it is that I am trying to write about, or I can't do it.
Space and time, not proteins and neurons, hold the answer to the problem of consciousness. When we consider the nerve impulses entering the brain, we realize that they are not woven together automatically, any more than the information is inside a computer.
An illustration I use to get people to understand it is this: I'll ask major corporate audiences: Why don't you just take all your traditional beliefs about organizations, and apply them to the neurons in your brain?
Throughout our lifetimes, we are constantly regenerating new brain cells in the hippocampus, a process called neurogenesis. New stem cells are constantly being born in the hippocampus that ultimately differentiate into fully functional neurons.
The human brain has 100 billion neurons, each neuron connected to 10 thousand other neurons. Sitting on your shoulders is the most complicated object in the known universe.
We are all now connected by the Internet, like neurons in a giant brain.
Your brain is built of cells called neurons and glia - hundreds of billions of them. Each one of these cells is as complicated as a city.
Because many squid have brain nerve fibres that are hundreds of times thicker than those of humans, neuroscientists have long used them for research. These nerve fibres have led to so many breakthroughs in the study of neurons that many scientists joke that the squid should receive a Nobel Prize.
Essentially, all expressions of human nature ever produced, from a caveman's paintings to Mozart's symphonies and Einstein's view of the universe, emerge from the same source: the relentless dynamic toil of large populations of interconnected neurons.
The ideal way to study the property of different types of neurons is to control individual types of cells independently and see what happens when you alter one type of cell. Optogenetics helps to realize this goal.
When you read a book, the neurons in your brain fire overtime, deciding what the characters are wearing, how they're standing, and what it feels like the first time they kiss. No one shows you. The words make suggestions. Your brain paints the pictures.
Neurons are living cells with a metabolism. And they need glucose in order to function. Glucose is the fuel of the brain, just like gasoline is the fuel of your car.
The neural code usually refers to how your current thoughts and feelings and perceptions are encoded in the signals that neurons are passing around - and it's not the same. The code is not the same for every person.
In the human mind, the number of possible connections that can be made between neurons greatly exceeds the number of atoms in the universe.
