Nervous System Check In

What proprioceptor is activated during the wind up of a baseball pitch when the muscles are lengthened?

• Ruffini endings

• Pacinian corpuscles

• Muscle spindles

• Golgi tendon organs

What happens when you step on a sharp object? Select all that apply.

• extend opposite leg

• extend stepping leg

• flex opposite leg

• flex stepping leg

What information can be obtained from EMG? Select all that apply.

• Activation onset

• Activation offset

• Force production

• Activation level

• Fatigue

For surface EMG, how should the sensor electrodes that measure muscle activity be oriented?

• Perpendicular to muscle fibers

• Parallel to muscle fibers

• 45 degree angle to muscle fibers

• Depends on the muscle

What happens to the EMG signal as a muscle starts to fatigues?

• decreases

• increases

• remains the same