how many cells are in the brain
New York: The Lyons Press, 1987: 150.The human brain holds about 100 billion nerve cells.100 billion The Scientific American Book of the Brain. Please note that the answer listed here - over 400,094,800 - refers to the number of cells in the human brain. The 100 billion figure, mentioned repeatedly in the sources quoted above, refers to neurons or nerve cells, which are only one kind of brain cell. As indicated by the 3rd cited source, neurons are actually thought to comprise less-far less, according to most authorities-than 50% of the total.