If your child has the following symptoms within 6 months of age, you should be highly alert to the possibility of cerebral palsy or brain injury, and seek early examination by a specialist: 1) general tenderness, weakness, or stiffness of the limbs; 2) head back, or even corneal inversion, body jerking; lower extremities crossed, double upper extremities posteriorly extended; 3) unresponsiveness and unresponsiveness to name calling: no response to name calling at 6 months of age No response at 6 months of age, may be mental retardation.　　4. Quiet and little movement (reduced spontaneous movement) or excessive movement; 5. Abnormal persistent crying, clenched fist, unable to open or thumb clenched in the palm of the hand; 6.