A Mother of a 1-Month-Old Infant Asks the Nurse Why

Multiple Choice

A mother of a 1-month-old infant asks the nurse why it takes so long for infants to learn to roll over.The nurse knows that the reason for this is:

A) A demyelinating process must be occurring with her infant.
B) Myelin is needed to conduct the impulses, and the neurons of a newborn are not yet myelinated.
C) The cerebral cortex is not fully developed; therefore, control over motor function gradually occurs.
D) The spinal cord is controlling the movement because the cerebellum is not yet fully developed.