Watch how to sign 'dimple' in American Sign Language.

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What Could Cause Shoulder Blade Pain?

@neetpgthings on Instagram: "Percussion myotonia happens when a quick tap over a muscle causes it to contract and hold that contraction longer than it should. Instead of relaxing right away, the muscle lingers in that tightened state, almost as if it's reluctant to let go. It’s subtle, but once you’ve seen it, you never forget it. This sign is often linked to conditions like myotonic dystrophy or myotonia congenita, where the electrical signals in the muscle fibers don’t reset normally. What loo