What causes a child not to be able to speak or walk?

Patient's question:

6 months discovered unable to stand straight, heels touching the ground, hands behind the back

Doctor's answer:

Consider whether there are issues with intellectual development, as well as the possibility of symptoms of autism or autism spectrum disorder. It is recommended to first go to a formal hospital for an intellectual assessment. If the child has intellectual disabilities, it is advised to seek early medical treatment in the pediatric rehabilitation department of a hospital.
We know that pediatric neurological diseases can cause significant harm to children. If treatment is delayed or incorrect, the condition can progress rapidly, causing great harm to the child. Therefore, parents should pay close attention to their child's condition and seek timely medical treatment.