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An experiment to determine how sensitive different areas of the skin is.

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Introduction

An experiment to determine how sensitive different areas of the skin is

I have decided to investigate this experiment by using two fine pencils and pushing them gently onto the surface of my volunteer’s skin. The pencils will be new because sharpening them can make a difference to the experiment, and may therefore lead to an unfair test. My volunteer will be asked whether they feel one pencil or two. My pencils will be put randomly i.e. sometimes, the two pencils will be further apart, but gradually, I will move the points together until they can only detect one, even though I may be pressing two. My volunteer will be blind folded so they

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Middle

Body Part

No. of pencils used

How many pencils did my volunteer feel?

Distance (cm)

Fingertips

2

2

5

Fingertips

2

2

2.5

Fingertips

2

2

1

Fingertips

2

2

0.1

Back of hand

  2

  2

5

Back of hand

 2

  2

2.5

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Conclusion

"1">

Cheek

 2

  2

5

Cheek

 2

  2

2.5

Cheek

 2

  2

1

Cheek

 2

  1

0.1

Back of neck

 2

  2

5

Back of neck

 2

  2

2.5

Back of neck

 2

  1

1

Back of neck

 2

  1

0.1

My experiment above shows that different parts of the body have different abilities to feel things touching the skin. As you can see from the results above, the most sensitive skin is at the fingertips, since my volunteer was able to feel all the pencil points (the smaller the gap between the points which she was able to detect, was where the more sensitive skin was). The experiment showed that there are more touch receptors in the skin at the fingertip area.    

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