The first quartile (Q 1) is defined as the middle number between the smallest number and the median of the data set.The second quartile (Q 2) is the median of the data. Use the median to divide the ordered data set into two halves. 2  If the median is a datum (as opposed to being the mean of the middle two data), include the median in both halves. 3  The lower quartile value is the median of the lower half of the data.
Many people associate shaky hands with Parkinsonâs disease, but the most common cause of shaking hands is actually essential tremor. Essential tremor is the most common neurologic disorder affecting adults, but itâs not well understood.
A balance disorder is a condition that makes you feel unsteady or dizzy, as if you are moving, spinning, or floating, even though you are standing still or lying down. Balance disorders can be caused by certain health conditions, medications, or a problem in the inner ear or the brain. Our sense of balance is primarily controlled by a maze-like structure in our inner ear called the labyrinth, which is made of bone and soft tissue.