Explaining Biology on Instagram: "What you’re seeing here is a real demonstration of how a muscle spasm happens beneath the surface. A muscle spasm is an involuntary contraction where muscle fibers tighten suddenly and release on their own, often appearing as rippling or twitching movements. These spasms occur when nerve signals misfire, forcing the muscle to contract without conscious control. Common triggers include dehydration, electrolyte imbalance, muscle fatigue, poor blood circulation, or