6. The Palmar Grip Reflex
While this particular thing is seen among monkeys and other primates today with their young, it’s still seen in human beings as well. We did come from the same background, after all. The Palmar Grip Reflex is left over from the time in which we were similar to the other primates. Babies had to hold on to their parents for their lives as they traveled among the trees often at incredibly fast speeds.

Our ancestors who, at this point, had tons of body hair capable of gripping. This reflex can be seen in the palms of newborns and even their toes today. Touching the palm causes them to grip tight while touching the foot causes their toes to curl. This primitive reflex can last all the way up to 6 months of age in human children. It can even allow them to be put onto monkey bars where they can grip and hold their own body weight. Amazing!