The Human Body 🧬 on Instagram: "Follow @explainingthebody to learn everything about the human body one post at a time 🧠⚙️ The startle reflex, scientifically known as the Moro reflex, is a primitive involuntary response that acts as a vital indicator of a newborn’s developing nervous system. When a baby feels a sudden loss of support or hears a loud noise, their brain triggers a symmetrical “fight or flight” reaction: they suddenly spread their arms wide, pull them back in, and usually cry. Thi