MMT Grading Systems 2 — Questions and Answers
Question 1: In the Medical Research Council (MRC) scale, what grade is assigned when a muscle contracts but produces no visible or palpable movement?
- Grade 0
- Grade 1 (Correct answer)
- Grade 2
- Grade 3
Correct answer: Grade 1
Grade 1 (Trace) on the MRC scale indicates a visible or palpable contraction without joint movement.
Question 2: Which MMT grade describes full range of motion against gravity with full resistance?
- Grade 3
- Grade 4
- Grade 5 (Correct answer)
- Grade 4+
Correct answer: Grade 5
Grade 5 (Normal) represents full ROM against gravity with full resistance that cannot be overcome.
Question 3: When using the Kendall grading system, what percentage corresponds to a 'Good' muscle grade?
- 50%
- 65%
- 80% (Correct answer)
- 95%
Correct answer: 80%
In Kendall's percentage-based system, a 'Good' grade corresponds to 80% of normal muscle strength.
Question 4: A patient can move through full ROM in a gravity-eliminated position only. What MRC grade does this represent?
- Grade 1
- Grade 2 (Correct answer)
- Grade 3
- Grade 4
Correct answer: Grade 2
Grade 2 (Poor) indicates the ability to complete full ROM only when gravity is eliminated.
Question 5: The '+' and '−' modifiers in MMT grading primarily serve to:
- Replace standard numeric grades
- Indicate partial range of motion or resistance differences (Correct answer)
- Denote pain during testing
- Signal the need for re-testing
Correct answer: Indicate partial range of motion or resistance differences
Plus and minus modifiers refine grades by indicating completion of more or less than half the ROM or resistance level.
Question 6: Which condition must be met before testing a Grade 3 muscle?
- Patient must be pain-free
- Muscle must first achieve Grade 2 in gravity-eliminated position (Correct answer)
- Joint must have full passive ROM
- Resistance must be applied distally
Correct answer: Muscle must first achieve Grade 2 in gravity-eliminated position
Grade 3 testing (against gravity) is only attempted after confirming the muscle can achieve Grade 2 in the gravity-eliminated position.
Question 7: In the Lovett scale, which term corresponds to Grade 2?
- Trace
- Poor (Correct answer)
- Fair
- Good
Correct answer: Poor
Grade 2 in the Lovett scale is termed 'Poor,' indicating full ROM with gravity eliminated.
MMT Grading Systems 2
In the Medical Research Council (MRC) scale, what grade is assigned when a muscle contracts but produces no visible or palpable movement?