Traditional lap pools are about 10 feet wide, though widths between 8 and 10 feet are common. (In competition pools, swim lanes are 2.5 meters wide, or about 8.2 feet.) You don't want to go too narrow with a lap pool.
The number of neurons in the brain varies dramatically from species to species. One estimate (published in 1988) puts the human brain at about 100 billion (10 11) neurons and 100 trillion (10 14) synapses.
1 They are stimulated by signals reaching them from Sensory neurons, other inter neurons or both. 2  It is estimated that human brain contains 100 billion inter neurons averaging 1000 synapses (or connection points) on each. 3  The term inter neuron encompasses a great variety of structural and functional types of cells.