sentences:  Over time, both the TLR and ATNR can cause serious damage to the growing child's joints and bones, causing the head of the femur to partially slip out of the acetabulum (subluxation) or completely move out of the acetabulum (dislocation).The palmar grasp reflex appears at birth and persists until five or six months of age.When an object is placed in the infant's hand and strokes their palm, the fingers will close and they will grasp it with a palmar grasp.