Sometimes when your calcium/magnesium ratio is off, you can get twitching. I get one in my diaphram that feels like a fish flopping in my chest. If you are low in calcium intake, or very low in magnesium, the muscles do a dance of sorts. So you could try to balance that out.
(February 2017) A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
Definition of floor. 1  1 : the level base of a room. 2  2a : the lower inside surface of a hollow structure (such as a cave or bodily part)b : a ground surface the ocean floor. 3  3a : a structure dividing a building into stories; also : storyb : the occupants of such a floor. 4  4 : the surface of a structure on which one travels the floor of a bridge.