Which statement best describes the MAS protocol?

Which statement best describes the MAS protocol?

• A. Passively move the joint through full ROM at standardized speed.
• B. Ask the patient to actively resist the therapist's movement.
• C. Record motor evoked potentials during provocative maneuvers.
• D. Measure joint range with a goniometer at maximum effort.

Answer: (A)

MAS assesses spasticity by evaluating resistance to a passive movement. The clinician moves the limb slowly and steadily through its full range of motion at a standardized speed to observe and rate the resistance, which reflects velocity-dependent tone. This approach is purely passive—no active patient effort—and it does not involve recording neurophysiological signals or measuring active range with maximal effort. Therefore, moving the joint passively through its full ROM at a standardized speed best describes the MAS protocol.

MAS assesses spasticity by evaluating resistance to a passive movement. The clinician moves the limb slowly and steadily through its full range of motion at a standardized speed to observe and rate the resistance, which reflects velocity-dependent tone. This approach is purely passive—no active patient effort—and it does not involve recording neurophysiological signals or measuring active range with maximal effort. Therefore, moving the joint passively through its full ROM at a standardized speed best describes the MAS protocol.