The point over a muscle where pressure or stimulation will cause contraction is called the

• A. Insertion
• B. Origin
• C. Nerve point
• D. Motor point

Answer: (D)

The motor point is the site on a muscle where the motor nerve fibers enter and the motor endplates are concentrated, so a small amount of pressure or stimulation at this spot reliably triggers a contraction. This makes it the best fit for describing where stimulation will cause movement. In contrast, the origin and insertion are simply the fixed and moving attachment points of the muscle to bone, not places where neural input most easily evokes contraction. The term nerve point can be misleading; motor point specifically identifies the contraction-triggering area.