1. T/F: The reflex time you'll be measuring today is the time
between the trigger signal and the beginning of the electrical activity.
Answer:
True.
2. An electromyogram measures electric potential signals
generated by:
Answer:
C. muscles.
the brain.
the heart.
muscles.
toenails.
3. What is the purpose of rubbing the electrode cream onto your skin
and the electrodes?
_________________________________________________
Answer:
lowers resistance and provides good contact
4. Please list the 3 measurements you'll be making in today's lab and
which signal you expect to be the strongest.
_________________________________________________
Answer:
ECG, EMG - achilles tendon reflex, EMG - patellar reflex; last one
strongest because biggest muscle group and isolated (and already did
experiment :).
5. Suppose Hobbes decided to trip Calvin in an effort to measure his
reflex time. If Calvin was hooked up via electrodes to an
oscilloscope, describe what a sample pulse shape might look like.
(Note: Please feel free to draw pictures to illustrate your
thinking)
