THE AMAZING ROBOTIC HAND

Question: 

How does your brain control your fingers?

Hypothesis: We predicted that the fingers being pulled by the strings, called tendons, would make each individual finger move just by the brain sending a signal to the hand.

 
Picture
Our Experiment

Materials: 

Picture

    String
    Straws
    Scissors
    Cardboard
    Hot Glue Gun

Safety Procedures

When you're cutting the cardboard watch your fingers! Also make sure to be super careful with the hot glue gun so you don't burn yourself!

Procedure:


  1. Gather our materials
  2. trace and cut out cardboard hand
  3. hot glue straws to hand make sure curl is at the end
  4. mark the joints and slit them
  5. slide  strings through all straws
  6. cut rubber bands and tie them to top of strings
  7. glue rubber bands extras to the back of cardboard hand
  8. pull the strings at the bottom and enjoy:)

The Science behind it

If you push on your palm you will see your fingers curl. The brain sends a signal to your muscles and the muscles react by pulling the tendon.  The fingers are special because there are no muscles in them. The muscles that control the tendons witch control the fingers are in the palm and also in the forearm .




Conclusions

In conclusion, our hypothesis was proven to be correct.  The fingers move by a string called the tendon in each finger (including your thumb).  Your brain controls the tendon which controls the fingers so you pick up stuff, put down stuff, etc. Therefore our hypothesis is correct.

About scientist 1

Sabrina Cheung is ten years old and is in 5th grade. She loves tennis and would like to be a geriatric doctor when she grows up. Sabrina has three siblings and their names are Sage, Seth and Sienna. She loves science and working with her friends that's why she did this project.

About scientist 2

Olivia Shea is ten years old,and is in 5th grade,She loves to play basketball and play with her puppy.When she grows up she would like to have a job that involves animals. She has two siblings. She enjoys science and working with friends so that is why she did this project. ;)

About scientist 3

Aine Hoekstra is ten years old in 5th grade.  She loves to ski at Thunder Ridge with her brother Stephen.  When she grows up she would like to be a physicist. She did this project because she likes joining groups with her friends.