Abstract: Objective：To explore the correlation between the development of hip joint and the ambient muscle tone in schoolage children with cerebral palsy.
Methods：Totally 56 children with cerebral palsy(41 spastic children，9 athetoid children，4 dystaxia children，2 children mixed with spasticity and athetoisis，37 diplegia，16 quadriplegia and 2 hemiplegia) in Guangzhou Rehabilitation Experimental School were recruited. All subjects received Xray examinations to analyze the value of MP.Both the muscle tone of hip flexation，adduction，and intorsion and the muscle strength of hip extention，abduction and extorsion were tested.
ResultsIn 56 patients，21 cases（37.50%） showed generally normal hip development，32 cases（57.14%） showed half dislocation of hip joint and 3 cases（5.36%） showed total dislocation of hip joint. Spearman correlation analysis showed that the value of MP was positively correlated with the muscle tone of hip flexation，adduction，and intorsion（P＜0.05） and was negatively related to the muscle strength of hip extention，abduction and extorsion（P＜0.05）.
ConclusionThere is correlation between the development of hip joint and the ambient muscle tone in schoolage children with cerebral palsy.

Key words: Cerebral palsy, The value of MP, Hip joint, Muscle tone, Muscle strengh