Intro to Muscle Performance

Question 1

What is strength?

Answer 1

maximal force a m./m. group at a specified or determined velocity

Question 2

How is strength testing a part of the APTA Patient Management Model?

Answer 2

idk

Question 3

Name the three approaches to strength testing

Answer 3

Isotonic: 1 range of motion/max weight the patient can do one time at full ROM
Isokinetic: Testing ROM at a given speed/Dynamometer
Isometric: force without change in m. length

Question 4

What is Manual Muscle Testing?

Answer 4

Sys. of measurement using manually applied resistance to determine the strength of a m. based on gravity

Question 5

Name all the MMT grades

Answer 5

Normal (N or 5): Full available ROM, against gravity, and able to hold against maximal manual resistance
Good (G or 4): Full available ROM, against gravity, and able to hold against moderate manual resistance
Fair (F or 3+): Full available ROM, against gravity, and able to hold against minimal manual resistance
Fair (F or 3): Full available ROM, against gravity, held against no manual resistance
Fair - (F- or 3-): move through more than half the available range of motion against gravity and no manual resistance
Poor + (P+ or 2+): move through less than half the available range of motion against gravity and no manual resistance
Poor (P or 2): Able to move through full available range of in a gravity minimized position
Poor - (P- or 2-): Able to move through partial range of motion in a gravity minimized position and no manual resistance
Trace (T or 1): No joint motion, gravity minimized position, muscle contraction palpable or observable
Zero (0): No observable or palpable muscle contraction

Question 6

MMT procedure

Answer 6

Explain purpose to patient, begin with fair test (stabilize), apply resistance mid range if passed; compare to uninvolved side

Question 7

What is a make test

Answer 7

Push into me, start slowly and gradually increase

Question 8

What happens in the break test

Answer 8

PT applies resistance until m. contraction is overcome by PT

more force than make

Question 9

At what point on the MMT scale does info become less valid?

Answer 9

grades above good (4)

not strong rel. with other strength measures

Question 10

Strengths of MMT

Answer 10

always available, inexpensive, and useful for ind. muscles

Question 11

Weaknesses of MMT

Answer 11

Imprecise, validity issues, and ceiling effects (ex. quad. just b/c you can’t break resistance doesn’t mean both sides are moving optimally