Every Human Reflex You Don't Control
Every Human Reflex You Don't Control 🥴 What actually causes hiccups ? A spasm (sudden involuntary contraction) of the diaphragm (the muscle under your lungs) followed by quick closure of the vocal cords , making the “hic” sound. It’s a reflex loop — you can’t control it consciously. 🧬 Why do we even have it? Not fully known. Evolutionary theory: leftover from our amphibian ancestors who needed a reflex to coordinate breathing and gill movement. Basically, your inner tadpole haunting you. 🦵 What is the patellar reflex ? When the doctor taps just below your kneecap (patellar tendon), your leg kicks out. What’s happening: The tap stretches your quadriceps → sensors in the muscle go “uh-oh” → send a signal to the spinal cord → spinal cord instantly sends back a “kick” command → leg jerks. 🛡️ Why does it exist? Protective — helps maintain balance & prevents falling. Like built-in auto-correction software. 🐔 What about goosebumps ? T...