As I plugged in my dryer (220 volts), 2 fingers touched the metal plug and I received an electric shock. My fingers, hand, and arm to elbow were immediately weak, tight and shaking but I was able to move away quickly. This was yesterday. The shaking stopped but my hand and arm feels like it is responding very slow, tight, and very strange. I have no visible burns. What happens to the nerves and muscles with a shock below the let-go threshold ?