Ball and socket joints are useful, but making a part slide over the surface of a sphere, held by magnets, requires a lot of fiddling to get right. We admire persistence and nailing all the details.

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You may have heard of the scapula before, though it is more commonly called the shoulder blade. Scapulas play a very important role in the way your arms, shoulders, and back move. The scapula is a ...

Your hip is a deep ball-and-socket joint where your thigh bone fits securely into your pelvis. When you have hip instability, your thigh bone may feel like it doesn’t fit into the hip socket securely.

Your hips are one of the largest joints in your body that bears weight. They’re the reason you can walk, squat down, twist, turn, and carry heavy items. Hips are ball-and-socket joints. They’re the ...

The shoulder is a complex structure present on the upper body that connects the arms to the torso. It consists of many components that work together to provide stability and a wide range of movement.

Shoulder instability occurs when your shoulder joint (ball and socket) has lost is normal alignment (ball resting symmetrically in the socket), which causes your arm to lose its support. The most ...