Causes. In ALS, the nerve cells that control the movement of your muscles gradually die, so your muscles progressively weaken and begin to waste away. ALS is inherited in 5 to 10 percent of cases. The other cases appear to occur randomly.
1 The smaller studio uprights usually weigh between 400 and 600 pounds. 2  The monstrous full vertical or large upright piano can weigh as much as half a ton.  A studio piano's center of gravity is also lower than a large upright's, as it is about 4 feet (1.2 m) tall as opposed to a large upright's roughly 5-foot height.
upright - a piano with a vertical sounding board. upright piano. forte-piano, piano, pianoforte - a keyboard instrument that is played by depressing keys that cause hammers to strike tuned strings and produce sounds. spinet - a small and compactly built upright piano. Adj. 1. upright - in a vertical position; not sloping; an upright post unsloped vertical, perpendicular - at right angles to the plane of the horizon or a base line; a vertical camera angle; the monument consists of two vertical pillars supporting a horizontal slab; measure the perpendicular height