Tonic neck reflex
The tonic neck reflex is a reflex that is checked for in newborns shortly after delivery. The test involves turn the head of the newborn to one side. The baby should move into a fencing posture, with one arm extended, and the opposite arm flexed at 90°. This reflex is most prominent at 2 months [[postpartum, and should disappear by 7 months of age. Persistence after 7 months is always abnormal, and often associated with cerebral palsy.