<prompt> Asymmetric tonic neck reflex ATNR disappears at ___6 months5 months9 months8 months  <response>: Asymmetric tonic reflex ATNR diappears by 6-7 months postnatally The tonic neck reflex is produced by manually rotating the infant;s head to 1 side and observing for the characteristic fencing posture extension of the arm on the side to which the face is rotated and flexion of the conralateral arm An obligatory tonic neck response, in which the infant becomes stuck in the fencing posture, is always abnormal and implies a CNS disorder Ref: Nelson 21st edition pgno: 3059 