MMT Limitations and Considerations 2

Question 1

Why is MMT considered less reliable when testing muscles in the antigravity position for patients with spasticity?

Accepted Answer

Spasticity increases passive resistance, artificially inflating apparent muscle strength

Answer

Spasticity adds passive resistance during movement, making a muscle appear stronger than it truly is on voluntary activation.

Question 2

Which of the following represents a PRIMARY psychometric limitation of the standard MMT ordinal scale?

Accepted Answer

The intervals between grades are not mathematically equal

Answer

MMT uses an ordinal scale, meaning grade intervals (e.g., 3 to 4) do not represent equal increments of actual force.

Question 3

A patient has severe joint effusion in the knee. How does this most directly affect MMT validity for quadriceps testing?

Accepted Answer

Arthrogenic inhibition reflexively reduces quadriceps activation, underestimating true strength

Answer

Joint effusion triggers arthrogenic muscle inhibition, which reflexively suppresses muscle activation and leads to underestimation of volitional strength.

Question 4

When testing a patient who is obese, the examiner's ability to palpate muscle contraction for Grade 1 detection is most likely to be:

Accepted Answer

Reduced due to increased subcutaneous tissue obscuring contraction

Answer

Excess subcutaneous adipose tissue dampens palpatory feedback, making it harder to detect a trace Grade 1 contraction.

Question 5

Which statement best describes the limitation of MMT in detecting early strength deficits in high-level athletes?

Accepted Answer

MMT ceiling effects prevent detection of deficits in muscles that are strong enough to resist manual force

Answer

A Grade 5 ceiling effect means manual resistance cannot distinguish a 10% strength deficit from normal in a well-trained athlete.

(MMT) Manual Muscle Testing Practice Test

(MMT) Manual Muscle Testing Practice Test

MMT Limitations and Considerations 2