a congenital disorder reflected by an abnormality on chromosome 15. Causes defects in neurology, motor functioning (gait abnormality), cognitive abilities (severe learning disabilities), and the propensity for unusually happiness, as well as loud bursts of laughter. Physically, suffers may have flatter head, larger mouths, and jaw protrusions. This disorder is also known as happy puppet syndrome.
ANGELMAN SYNDROME: “A person with Angelman Syndrome has chromosomal abnormalities that cause physical abnormalities, difficulties with learning, and an unusually happy demeanor. “