Developmental delays:

Down syndrome causes a number of mental and emotional down syndrome symptoms as well. Down syndrome kids often have down syndrome symptoms such as problems with long-term memory. They also don’t understand abstract concepts, as well as other children, do. Because down syndrome affects the way the brain develops, down syndrome patients usually will score lower than 50 on an IQ test (the average person has an IQ between 85 to 115).

Low muscle tone:

Most down syndrome individuals have low muscle tone throughout their body, especially in the muscles around the neck and armpits. As a result, down’s people lack coordination and this can cause stumbling and a lack of balance.