A type of joint (gliding joint) that allows bones to slide slightly over each other with limited movement, like joints in the spine or wrist.
From Greek 'arthron' (joint) + 'dia' (through/across). This anatomical term describes the nature of movement in these joints—bones glide across each other rather than hinge or rotate.
Arthrodial joints in your spine and between your small bones are incredibly clever—they allow just a tiny bit of movement individually, but thousands of them stacked together give your spine the flexibility to bend and twist in almost any direction.
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