T
twilyth
Guest
Neuroscientists thought for a long time that neurons were the only brain cells that were really important for conscious thought, but they're beginning to realize otherwise. Electrical signaling I think can happen between glial cells too (see anon), but the pulses you read on an EEG are all being pumped out by neurons. Here's a good overview.
more at the link - feed your head.
When we hear the words “brain cells” most of us immediately picture the spindly, spider-like neurons that send electrical messages through our brain. But did you know that these make up just 10% of our brains? The other 90% is comprised of cells called glia, Greek for “glue”. For many years, glia were quite literally thought to be the ‘glue’ of the brain, supporting the all-important neurons. We observed that neurons could send electrical signals, whereas glia could not, turning our scientific attention toward neurons as the active, information processing components of the nervous system. In the last twenty-or-so years, however, it has become clear that glia are far more than cerebral superglue. They are now thought to play a key role in how our brains work and process information, both in health and disease[1, 2].
Glia can be divided into two categories: microglia are like the immune cells of the brain, vacuuming debris and foreign bodies; macroglia come in several flavours, and the most important of these for information processing are the astrocytes – star-shaped cells found throughout the brain.
more at the link - feed your head.