At this age also a capacity to modulate the direction-specific responses to taskspecific conditions, such as initial pelvis position developed. In the latter group of children the adjustments were more often stereotyped than in normally developing children. This was especially true for children with lesions in the periventricular white matter. In addition, children with CP and children born preterm with or without brain lesions showed deficits in the capacity to modulate postural activity with respect to body configuration. Some children lacked this capacity entirely, while others could adapt postural activity in the position which they often adopted during daily life.
Training affects the development of postural adjustments in sitting infants.