Independent sitting of babies with Down syndrome is very important because sitting is the primary position on improving play activities. It is a known fact that late acquisition of sitting posture has negative effects on gross motor skills such as crawling and walking as well as fine motor skills. The extent to which trunk development affects the developmental stages of the child and his performance in motor behaviors and skills should be evaluated. At the same time, trunk control should be evaluated at various periods in order to determine early intervention and treatment strategies in babies with Down syndrome who are at risk for motor development.
In infants with Down syndrome at risk in terms of neurosensory motor development retardation, the level of trunk control can determine the level of trunk control towards motor development in infants with down syndrome.~For this reason, the purpose of this study is to adapt the segmental assessment of trunk control scale to Turkish by evaluating the motor development in children with Down syndrome. It is the investigation of validity and reliability.