Reaction at CATHODE: 1  H+H+ and Cu2+Cu2+ ions are attracted to the cathode. 2  Cu2+Cu2+ ions are preferentially discharged as Cu2+Cu2+ is lower in the electrochemical series than H+H+. 3  Each Cu2+Cu2+ ion gains two electrons from the cathode to form one copper atom.
One of the most well known spine cranks is the boston crab, which is usually depicted in pro-wrestling context. Similarly to neck cranks, spine cranks are illegal techniques in most combat sports, excluding some submission wrestling and mixed martial arts competitions, where they are used as submission holds.
A coup injury is the result of a sudden, violent stop that causes the brain to accelerate forward and hit the side of the skull. A contracoup injury, on the other hand, occurs when the brain accelerates forward, hits the side of the skull, and then bounces off the other side of the skull. In both cases, the brain is damaged as it rubs against the inner ridges of the skull.