The above data indicate that children with severe forms
of CP, i.e. children who are not able to sit independently by
the age of 11
2 years, are hampered by serious dysfunction of
the basic level of postural control. In children with less
severe forms of CP the first level of control is basically
intact. At the second level of control, multiple forms of
disorganization and/or adaptation are found: a dominance
of cranio-caudal recruitment, an increased degree of
antagonistic co-activation and a reduced or absent capacity
to adapt the degree of muscle contraction to the specifics of
the situation. The extent to which these problems are
present depends on the postural challenge of the situation