Sciatica pain isn't a disorder, but rather a symptom of a larger problem, usually a bulging or herniated vertebral disk. This is the most common cause of sciatica nerve pain, but other spinal issues such as a tumor (yikes!) or injury (major hip surgery) could also be the cause. A condition called *Piriformis syndrome, can also cause sciatica. This is when the piriformis muscle tightens spasms, putting pressure on the nerve creating pain.
Confidence votes 7.8K. Reverse polarity is the opposite of normal polarity. Normal polarity in electronics is when you have the positive hooked up to the positive terminal and the negative to the negative terminal.Reverse polarity would be having the positive hooked up to the negative terminal and the negative to the positive terminal. The same concept can be used with magnets.everse polarity would be having the positive hooked up to the negative terminal and the negative to the positive terminal. The same concept can be used with magnets.
When the machine is set on straight polarity, the electrons flow from the electrode to the plate, concentrating most of the heat on the work. With reverse polarity, the flow of electrons is from the plate to the electrode, thus causing a greater concentration of heat at the electrode.