PS275 Chapter Notes - Chapter 6: Shoulder Joint, Hip, Kipsigis People
Document Summary
Infants make remarkable progress in first year at controlling their movements and perfecting. After a month, brain and neck muscles matured enough to permit infants to lift chins while lying flat on their stomachs. Soon after they lift their chests, reach for objects, roll over and sit up is someone supports them. Infants who are quick to proceed through definite motor sequence are not necessarily brighter or advantaged. Child"s rate of motor development tells us very little about future developmental outcomes. Motor development also proceeds in cephalocaudal and proximodistal patterns. However kicking movements of infants contradicts cephalocaudal rule. Galloway and thelen suggest structure of hip joint may contribute to infant"s early ability to control legs as hip joint is more stable and contrained than shoulder joint. Thus the amount of motion to be controlled is far less for hip joint. Infants able to coordinate hip movement earlier than shoulder movement, contradicting cephalocaudal rule of thumb.
