Children with CP mainly exhibit central motor dysfunction and abnormalities in muscle tone and posture, often accompanied by multiple mental retardation, hearing and speech impairment, and abnormal behavior. The main symptoms are: 1. Central motor dysfunction: The child’s motor development is backward, such as head lifting, rolling over, sitting and limb movement, difficulty in voluntary movement, rigid, uncoordinated and asymmetrical movements, abnormal motor patterns or joint responses and involuntary movements. 2, muscle tone and postural abnormalities: manifested as increased or low muscle tone, variable muscle tone height. There are often abnormal postural reflexes. For example, the child’s head and limbs cannot be kept in the midline position, or present bowed retroflexion, or spasticity of the limbs. (1) Developmental delay About 66% of children with cerebral palsy are mentally retarded, of which about 50% have mild to moderate mental retardation and about 25% have severe mental retardation. Spastic tetraplegia and tonic CP are often worse. Very few children with tardive dyskinesia have severe mental retardation. (2) Visual impairment About 30% of children have visual impairment, most commonly intraocular strabismus and refractive error, such as myopia and amblyopia, etc. A few have nystagmus and occasionally total blindness. (3) Hearing impairment About 50% of children have hearing impairment, and some children have hearing loss or even total deafness. Most of the children have hearing loss to high audio, which can only be detected by brainstem auditory evoked potential measurement. (4) Speech and language deficits in children with CP are closely related to brain damage before and after birth and secondary brain developmental delay after the damage, and can also be caused by hearing deficits and other factors. It has been reported that about 1/3 to 2/3 of children with CP have varying degrees of language impairment. They have delayed speech development, difficulty in articulation, slurred diction, inability to speak in sentences, inability to express themselves correctly, and in some cases, complete aphasia. Children with tardive dyskinesia and ataxia often have language disorders, and children with spastic tetraplegia and bilateral paresis also often have language disorders. (5) Epilepsy About 10-30% of children have seizures at different ages. Spastic quadriplegia, hemiplegia, monoplegia, and hypo-intelligence are more common, while tardive dyskinesia and ataxia are rare. (6) Mouth, face, and teeth dysfunction CP children have weak sucking, difficulty in swallowing and chewing, poor lip closure, frequent salivation, and some have dental caries or underdeveloped teeth. (7) Emotional and behavioral disorders Children with CP often show good crying, capricious, stubborn, withdrawn, eccentric, emotionally fragile, easily agitated, some have a sense of brightness, pleasure, emotional instability, etc.. These symptoms are more common in children with tardive dyskinesia. In addition, most children with CP show excessive activity, distraction, and disorganized behavior. Occasionally, children with CP may use their hands to hit their heads and jaws and other self-injurious “compulsive” behaviors. (8) Others Most children have physical developmental delays, malnutrition, and are more common in infants with severe motor impairment, and are often susceptible to respiratory infections due to low immune function. Most children have learning and social difficulties due to single or multiple deficits in somatomotor, sensory, intellectual, language, emotional, behavioral, etc.