Neurotransmitter Lab

In class, we attempted to do a lab to learn about the relationships between different muscles in the body. Why did I say “attempt?” Well, our lab did not really work out the way we all wanted it to. We were testing to see how our agonist and antagonist muscles allow us to perform certain tasks with smoothness. According to Backyard Brains, your agonist muscles cause movements by contracting. Our antagonist muscles oppose the specific motion.

Each muscles has a relationship with another muscle when someone moves a certain body part. We are are able to move gracefully, and with balance because of these two muscles. Even when we are not moving, our muscles are still working for us.

In order to do this lab, we had to place 2 sticker electrode patches on our partner’s biceps and then connect two alligator clips from the Muscle “Spikerbox.” We also added two to the side of her triceps, and then on the back of her hand.

Then, we connected our phone or our computer to the Spikerbox. The SpikeRecorder software was already downloaded on our computer and phone.

After, we turned on both EMG channels on the Spikerbox. At this step, our experiment did not work the way that we wanted it to. When my partner contracted and retracted her muscles, the software would not show waves, but showed sound waves. For example, it would show if she talked. She tried to do a push up, but that did not affect the waves, and she also tried to wave, but that did not record anything either.


I cannot fully answer the questions of the procedures accurately, but there is enough information to figure out which muscles have relationships with other muscles. When we wave our arms, the triceps are the agonist muscles, and the biceps are the antagonist muscles. The triceps contract, and the biceps loosen, and oppose the opposite motion. When we do a push up, When we go down, our triceps are the agonist muscles, and the biceps are the antagonist muscles. When we go up, its reversed, and our triceps are the antagonist muscles, and our biceps are the agonist muscles.

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