<prompt> A baby on examination shows unilateral moros reflex with positive palmar grasp reflex. The site of lesion is :C3 - C4C5 - C6C8 - C1C1 - C2  <response>: Ans. is b C5-C6 Moros reflex is a neonatal reflex which develops by 28th wk of gestation and disappears by 12 wks of age.Moro reflex is obtained by placing the infant in semi-upright position, then the head is momentarily allowed to fall backward with immediate re-support by the examiners hand.The child symmetrically abducts and extends the arms and flexes the thumbs, followed by flexion and adduction of upper extremities.Unilateral Moros reflex is seen in :Erb s palsy C5-CJ damageSpastic hemiplegiaFracture of humerus or clavicle .Exaggerated Moros reflex is seen in - cerebral damage.Some important facts about neonatal reflexes :Sucking reflex - observed by 14 wks of gestation.Rooting reflex - develops by 28 wks gestation.Palmar grasp reflex -develops by 28 wks and disappears by 4 months of age.Toxic neck reflux - disappears by 8 months of age. 