For example, if position at00 held block30.gif then we know the puzzle has not been solved. This makes sure that only browsers that can do the game will actually see the grid. Others get a message saying that they can't play - could suggest an alternative. This is a graphic tracing of a real neuron from the frontal cortex of the brain . The oval in the middle is the cell body or SOMA .
Neurons communicate with each other by an electrochemical process.
The computerized instrument that generated this image is called Neurolucida. Scientists use this system to visualize and analyze 3-dimensional data using real neurons. To see this neuron rotating around an axis, move your cursor over the image below. Images courtesy of Dr. Dale Sengelaub .