Abstract
The changes of popliteal angle after delivery, appearance of stepping reflex and postural reflex at one month of age, motor development of prone position and possible causes of not supporting one's body weight after five month of age were studied. Immediately after delivery, popliteal angle was less than 100 degrees in 72.5% and arm recoil was positive in 83% of the 112 newborn infants. The change of patterns of popliteal angle after delivery was divided into four groups: group A, popliteal angle was constantly under 100: group B, popliteal angle was under 100 after delivery and became 100 and return to normal; group C, at first popliteal angle was over 100 and gradualy return to under 100; group D was others.
The possible causes of popliteal angle over 100 after delivery were also discussed.
The possible causes of not supporting one's body wieght after five month of age were as follows: 1) normal variation: shufflers, slow starters and others. 2) mental retardation 3) some form of cerebral palsy. 4) myopathy: benign congenital hypotonia.
