The main goal for this lab was to take note and experience the relationships of the muscles within the human body. However, our class focused specifically on the arms. We learned that there are many signals send to the muscles to forgo activities from the brain. I learned in the lab that there are not one, but many muscles that forgo any type of movement. It is not just one muscle for each specific movement. The lab also mentioned the fact that there are over 600 skeletal muscles in our bodies. That really surprised me because I never really thought about skeletal muscles and how significant of a function they have in the human body.
The lab discusses the steps we went about to perform and get the right answers we needed.
1.) Place 2 sticker electrode patches on the biceps and connect the 2 alligator clips to the metal nub
2.) Connect a stereo speaker to one of the audio jacks. Connect the other one to your phone
3.) Turn on both EMG channels until you hear activity
4.) Start the experiment. First, try to wave and move your arm around and continue moving it around until there are no spikes, or the antagonist is relaxed.
5.) Try a push up to see if you can get any other movement or data
Although I was not in class the day we performed the experiment, the class actually did not end up getting any results because the equipment was not cooperating. However, after discussing with some classmates, they explained to me that learning the different movements with the hands and arms, such as waving your hand, is almost the same as if someone were to open the arm fully. Flexion is the action of pulling your arm towards you, while extension is stretching it out. The lab essentially was a way to figure out which part was an antagonist or agonist. When using an EMG, it is easy to figure out which is the agonist when the spikes increase on it. If the experiment were to have worked out, I would’ve suggested trying a variety of different hand motions, including high fives, arm wrestling, handshakes, throwing a ball, etc.