Which statement is not true of trismus?

Question

Quizplus · Accepted Answer

Crepitus is the cracking sound that may be heard in a joint.The dentist can use a stethoscope to listen for sounds of clicking,popping,or crepitus in the temporomandibular joint.It is unknown whether joint sounds are related to problems with the jaws.
Trismus is spasm of the muscles of mastication which hold the mandible in position.
Trismus is the most common cause of restricted mandibular movement.
Patients' descriptions of trismus include a jaw that "gets stuck," "locks," or "goes out."

Which Statement Is Not True of Trismus