Reflex which is not present in child at bih is
Symmetric tonic neck reflex appears by 4-6 months and disappears by 8 - 12 months. Moro&;s reflex - hand opening appears by 28 wks, extension and abduction of the upper extremities by 32 wks and anterior flexion by 37 wks of intrauterine life and disappears by 3 - 6 months after bih. Asymmetric tonic neck reflex appears by 35 wks of intrauterine life and disappears by 4 - 6 months after bih. Crossed extension response begins at 28 weeks gestation and disappears by 1-2 month. Reference : page 142 Ghai Essential Pediatrics 8th edition and page 15 Paediatric Clinical examination A Santhosh Kumar
Moro's reflex
Symmetric tonic neck reflex
Crossed extensor reflex
Asymmetric tonic neck reflex
New born infants