In this edition we highlight the lateral SC (sternoclavicular) joint.

The SC joint is a synovial, saddle-shaped joint connecting the clavicle to the manubrium of the sternum.

An articular disc inside the joint provides structural support and increases mobility, allowing movement in three planes (frontal, transverse & sagittal)

⭐️ Cool fact: It is the only bony link between the shoulder/arm and the rest of the body. It allows significant range of motion, including elevation, depression, protraction, retraction, and rotation of the clavicle.

Assessing the SC joint

✅ Patient supine with arm pointed straight up. Should be at 90 degrees to the torso.

✅ FULLY internally rotate patient’s arm. This ensures they cannot cheat by recruiting other muscles.

✅ Instruct patients to maintain this position, then apply straight laterally away from their torso.

A positive test is an inability to resist and maintain their arm position. This would indicate the need for a corresponding adjustment.

Adjusting the SC Joint

✅ Contact & pretension are key with this one. Its important to make sure we are creating pretension in a M-to-L direction while using our thenar to ensure a more comfortable contact.

✅ Again, with the thrust hand we want to traction in an M-to-L direction. Picture a gapping in the SC joint.

✅ Utilize your whole body to deliver a quick, crisp thrust.

✅ Click the button below to watch a quick video that guides you through the adjustment 👇

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That’s it for this edition.

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