The nurse is conducting a physical examination of a 5-month-old boy. Which observation may be cause for concern about the infant's neurologic development?
a) His toes hyperextend when the bottom of the foot is stroked.
b) The infant grasps a finger when it is placed in his palm.
c) The infant displays an asymmetric tonic neck reflex (fencing reflex).
d) The anterior fontanel is open and easily palpated.
Answer: The infant displays an asymmetric tonic neck reflex (fencing reflex). (Birth-4mos)