But the rest of her world is not perfect. Gloria is affected by a rare genetic disorder called Williams syndrome. With an IQ of about 55, Gloria literally cannot subtract three from five or make change for a dollar. But what she and others with her affliction share is music. Innately connected, they often have an astute grasp of music's technical aspects-the beat, rhythm, tone, and timbre.
Identified more than 40 years ago, Williams syndrome results from non-homologous recombination during gametogenesis that deletes about 20 genes on one copy of chromosome 7.1 Characteristics of Williams syndrome include pixie-like features-upturned nose, small chin, protrusive ears-as well as stunted growth, heart problems, poor visuospatial cognition, sensitivity to loud noises, a gregarious personality, and an average IQ of about 60. Many of these individuals have difficulty with the simplest of mental and physical tasks, but some abilities, especially verbal skills, appear to be ...
