To remember the right hand rule, write the xyz order twice: xyzxyz. 1  Next, find the pattern youâre looking for: 2  xy => z (x cross y is z) 3  yz => x (y cross z is x; we looped around: y to z to x) 4  zx => y.
Huntington disease is a progressive brain disorder that causes uncontrolled movements, emotional problems, and loss of thinking ability (cognition).Adult-onset Huntington disease, the most common form of this disorder, usually appears in a person's thirties or forties.untington disease is a progressive brain disorder that causes uncontrolled movements, emotional problems, and loss of thinking ability (cognition).
Huntington's disease (HD) is an inherited disorder marked by progressive degeneration of brain cells. Most individuals with Huntington's disease develop some signs and symptoms in their 30s or 40s.untington's disease results in worsening difficulty in motor control (movement), cognition (thinking), and behavior. In many cases, a person with HD will experience the same areas of difficulty throughout the course of the disease, with severity varying from stage to stage.