Our class worked on the Sensory Lab, where we used two different paper clips, one with two points and a part cut off with only one. we got into partners and each of us tested different patterns of the points on the back of the hand, finger tips, and forearm to analyze our senses. We bent the paper clip with two points from 2cm, to 1.5cm, 1 cm, 0.5 cm, and lastly 0.3 cm. My partner, Sophia, would then add in her graph what point she was using each time (2 or 1), for each measured section, as well as what I thought it was.
What I figured out was the smaller the points got, the closer it was to feeling like only one point, so I started to get confused.
1.) In the pre-lab, I predicted that the finger tips would have the highest density of sense receptors. After doing the lab, I realized I was right. Sophia’s fingertips had nearly the best score of the data compared to the other two. I think this is because when I did this part, I felt more sensitive at my fingertips and could feel a lot more responsively.
2.) Humans have a higher density of receptors for touch in some areas of skin than in other areas in my opinion because although each person has a different body type and size, there are parts in all of our bodies with more skin, less skin, and more sensitive parts whether we are born with it or it is due to some injury or deformation. Scientific Psychic mentions the five senses and how with touch, some parts have more nerve endings that link to the brain, causing it to be more sensitive in these parts.
3.) My results and those of my partner does not support the prediction we made in the Pre-Lab about getting the same data. Although we both had similar parts where the answer was foggy because of simply how small the gap of the two points were getting, there was no way that the data could be exact. Every person has completely different sizes and shapes, leading to different nerves and spots and sensitivity levels. Bringing back the five senses Healthtap mentions that just as people have different sensitivities to taste, such as someone not liking spicy food, while their friend or family member loving it. Everyone reacts a different way. It is just the way our bodies are made up.
4.) The factors that could account for variation in sensitivity to touch from one person to another could vary with multiple different options. Ultimately, it all depends on the amount of nerve endings present.
5.) Activities such as playing a guitar, laying bricks, and preparing food, or playing video games could affect a persons sensitivity to touch because of the usage of the nerves to perform these activities. Your hands and arms are constantly moving around.
After finishing up the lab and recording data, I noticed that the narrower the two points got, the harder it was to figure out how many points were being poked. Sophia was more sensitive in her fingers and was able to tell more accurately in this area, compared to the hand or forearm, as did I.