Children whose seizures have some of these features are less likely to have the syndrome of Childhood Absence Epilepsy. 1  An absence seizure with mild clonic components involves mild, often subtle twitching of the eyelids, the corners of the mouth, and sometimes the arms.
1 Trisomy 21 â More than 90% of Down syndrome cases are caused by trisomy 21. 2  An extra chromosome (chromosome 21) originates in the development of either the sperm or the egg. 3  When the egg and the sperm unite to form the fertilized egg, three (rather than two) chromosomes 21 are present.
Down Syndrome is a well-known genetic disorder caused by a chromosome abnormality that occurs before birth. Typically babies have 46 chromosomes, but those with Down Syndrome are born with 47 chromosomes, which causes abnormal changes in the development of the childâs body and brain.These children have very distinct characteristics. They are generally small, with a flat face and a tongue that sticks out.any schools have classes for students with disabilities that may not do well learning in a standard environment. There are also special schools geared for people with disabilities. As a teacher, there are several strategies you can implement to help the child with Down Syndrome thrive.