How fast do brainwaves travel?
The fastest nerve conducts an impulse at 120 metres per second. However transmission speed is related to diameter, and so nerves with a smaller diameter conduct impulses at a much slower speed. In general, the conduction velocity is approximately equal to 6 x axon diameter in micrometres. The constant value of 6 is referred to as the Hursh factor.
Brainwave are the pattern of waves produced by brain. These waves can vary in their frequency and based on the frequency produced they are categorised as beta brainwaves, alpha brainwaves, theta brainwaves, delta brainwaves and gamma brainwaves. Brain will be at different state whilst producing different frequency.
No ADD and ADHD are different in most ways. ADD stands for Attention Ddeficit Disorder and ADHD stands for Attention Deficit Hyperactive Disorder. People with ADD are calmer or quieter then people with ADHD. The brainwaves are different too. ADD peoples brainwaves are slow and go from high to low points but ADHD peoples brainwaves are fast and low points making them hyperactive.