What is the term for the amount of excess movement in a motion unit when it is in neutral position?

What is the term for the amount of excess movement in a motion unit when it is in neutral position?

• A. End play
• B. Form dictates
• C. Joint play
• D. Accessory joint movements

Answer: (C)

Joint play describes the passive translation between the joint surfaces when the joint is relaxed in neutral. It’s the small amount of slack movement you can feel before the muscles, ligaments, and joint structures restrict further motion. In a healthy joint, this play is present but limited; excess joint play indicates ligamentous laxity or hypermobility, while too little play points to stiffness or hypomobility. End play, by contrast, is the resistance or “end feel” you encounter as you push to the limit of range—the boundary once the joint’s passive constraints come into play. Accessory joint movements refer to the tiny motions that accompany the main joint action and are necessary for full function, not specifically the amount of excess movement in neutral. Form dictates isn’t a standard term for this context. So the term for the amount of excess movement in neutral is joint play.

Joint play describes the passive translation between the joint surfaces when the joint is relaxed in neutral. It’s the small amount of slack movement you can feel before the muscles, ligaments, and joint structures restrict further motion. In a healthy joint, this play is present but limited; excess joint play indicates ligamentous laxity or hypermobility, while too little play points to stiffness or hypomobility.

End play, by contrast, is the resistance or “end feel” you encounter as you push to the limit of range—the boundary once the joint’s passive constraints come into play. Accessory joint movements refer to the tiny motions that accompany the main joint action and are necessary for full function, not specifically the amount of excess movement in neutral. Form dictates isn’t a standard term for this context.

So the term for the amount of excess movement in neutral is joint play.