Until recently, there were no experimental reports of superconductivity in graphene although its close relatives, graphite and fullerenes can be made superconducting by intentionally introducing electrons in the material (doping).
For the British literary movement, see Spasmodic poets. A spasm is a sudden involuntary contraction of a muscle, a group of muscles, or a hollow organ such as the heart. A spasmodic muscle contraction may be caused by many medical conditions, including dystonia. Most commonly, it is a muscle cramp which is accompanied by a sudden burst of pain.
Cardiac muscle (Involuntary) Voluntary muscles are those that you can conciously control; for example your biceps. Involuntary muscles are controlled by your subconscious and you have no control over them such as your esophagus or stomache (smooth muscle) or your heart (cardiac muscle) Source: Modern Biology by Holt.