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).
About Huntington's Disease. George Huntington, M.D., who first described the disease that bears his name. Huntington's disease is a progressive brain disorder caused by a single defective gene on chromosome 4 â one of the 23 human chromosomes that carry a personâs entire genetic code.This defect is dominant, meaning that anyone who inherits it from a parent with Huntington's will eventually develop the disease.ymptoms. Symptoms of Huntington's disease usually develop between ages 30 and 50, but they can appear as early as age 2 or as late as 80. The hallmark symptom of Huntington's disease is uncontrolled movement of the arms, legs, head, face and upper body.