Nerve stimulators supply electrons to depolarise a nerve. The number of electrons supplied per stimulus equals the current. It is important to keep winding up the stimulating current to make sure that the nerve is completely depolarized, until the muscular response does not increase any more. This is called the supra-maximal stimulus. There are many types of nerve stimulators that are available such as changing resistance, constant voltage, and constant current nerve stimulators.

Neuro Pinwheels are the instruments used for measuring subluxation and reflex of a person. It has a rolling head generally made of steel or plastic. It has a handle with proper grip. It is used for to test a patient's ability to feel sensation over a particular area of skin. Its features functionally weighted handle that is unmatched in its ability to maintain the precise and continuous pressure needed for consistent test results.