Question

1)Common methods for measuring muscle action involve: Select one: a. Palpation b. Simulation c. Mechanomyogram d. Surgery

2)During an arm curl exercise, the contralateral obliques act as

Select one:

a. stabilizer

3) Chest press machines allow people to sit and move the handles with the hands. Stabilizers for a chest press machine exercise include:

Select one or more:

a. Internal and external obliques

b. Pectoralis major

c. brachialis

d. Upper trapezius

e. none of the above

f. Rhomboids

g. Middle trapezius

b. neutralizer

c. antagonist

d. agonist

e. synergist

40Surface EMG can be used to determine the following:

Select one:

a. Number of motor units and fibers

b. Length-tension relationship

c. Amount of activation

d. Twitch forces

5)What will have the least impact on EMG signal quality?

Select one:

a. Adipose thickness

b. Inter-electrode distance

c. Alignment to muscle fibers

d. Muscle fiber types

Answer 1

1. C) Mechanomyogram

The mechanomyogram is the generation of mechanical signal and its analysis on the muscle surface as the muscle undergoes contraction. It helps in determining the function of the muscle and its activity and as the muscle activity changes, it helps in provide a MMG peak. Hence it helps in determining the muscle activity and devices like an accelerometer or microphone is used to determine the activity by placing it one the abdomen.

The first option is not correct because palpation is a process which is used by medical practitioner to find out a disease or diagnosis and it helps in providing a physical sign for a disease occurrence. It leads to feeling of a body part which to determine the characteristics, firmness, location or the shape.

The second option is incorrect as stimulation is a process by which an activity is evoked and it uses either nerve impulse, muscle or sensory part which stimulates certain activity.

The last option surgery is not correct because in this process a medical device or equipment is used to take care of the pathological condition by removing it under the influence of anesthesia.