1. Prosthetic Arm

2. Learning Objectives
By the end of the session, participants will be able to:
Explain the rules to students,
Identify the major bones and joints of the arm, and
Create a prosthetic arm from available materials to pick up an object.

3. How 3-D printed are changing kid’s lives around the world

4. Prosthetic Arm Rules Middle School (6 and 7/8)
High School (9/10 and 11/12)
Design, construct, and operate a simulated prosthetic arm
Grab and release bean bags into Target Zone as fast as possible
One at a time
Device must have at least two artificial fingers.
At least two fingers must open and close
Must grab and release object
Design, construct, and operate a simulated prosthetic arm
Grab, stack, and release plastic cups into a pyramid in fastest time
One at a time
Device must have at least two artificial fingers.
At least two fingers must open and close
Must grab and release object

5. Prosthetic Arm Rules Middle School (6 and 7/8)
High School (9/10 and 11/12)
May use any material, except hazardous ones
NOT controlled or operated by either member’s fingers, hands, or wrists
Own method of immobilization
May use unencumbered hand to hold or move bucket
May use any material, except hazardous ones
NOT controlled or operated by either member’s fingers, hands, or wrists
Own method of immobilization
May use unencumbered hand to hold or move bucket

6. Middle School Competition Area Specs
Plastic All-Purpose bucket
Skeet Ball Target Zone
Bean bags
Count # of bean bags on initial impact inside of scoring zones

7. High School Competition Area Specs
Standard six foot table
21 pre-stacked red 16 ounce plastic cold cups
Bounce Free and Soft dryer sheets
Count # of cups successfully stacked on second tier or higher at end of trial
Task Area
(60 cm)
Table / Task Area
Working Area
74 cm
180 cm

8. Engineering Lab Book
Include sketches of human arm and device iterations with correctly labeled structures.
Include Materials Table.

9. Activity: Bones and Joints
Objective:
Identify the major bones and joints of the human arm

10. Bones and Joints of the Upper Extremity
Humerus
The longest and largest bone in the upper extremity
Radius
The other bone of the forearm, shorter than the ulna.
Ulna
A long bone in the forearm parallel with the radius; at the proximal is the elbow and the distal end is the wrist.
Shoulder Joint/Complex
Elbow Joint/Complex
Humeroulnar Joint – simple hinge-joint
Humeroradial Joint – arthorodial joint allowing gliding and sliding motions
Proximal Radioulnar Joint – pivot joint

11. Bones of the Hand Carpals Metacarpals Phalanges
The wrist is composed of 8 separate carpal bones.
Metacarpals
The intermediate part of the hand skeleton that is between the carpals and the phalanges (up to the knuckles); 5 metacarpal cylindrical bones
Phalanges
The fingers of the hand contain 14 digital bones.

12. Joints of the Hand Wrist Joint Metacarpophalangeal Joints
Radiocarpal joint
Carpometacarpal joint
Intercarpal joints
Metacarpophalangeal Joints
Interphalangeal Joints
intercarpal joints
carpometacarpal joint
midcarpal joint
radiocarpal joint
interphalangeal
joints

13. Activity: Grab and Release an Object
Supplies per Group:
2 sheets of card stock paper
9 straws
14 craft sticks
3 pony beads
General Supplies:
Various objects such as empty paper clip box and empty water bottle
Glue gun
Scissors
Masking tape
A few bamboo skewers
Rolls of string
Objective:
Design, build, and operate a prosthetic arm from given supplies to grab various objects one at a time and release them

14. Activity: Grab and Release an Object
Using the given supplies, design and build a prosthetic arm to grab and release an object.
Device MUST have at least two artificial fingers.
At least two artificial fingers MUST open and close.
Can NOT use opposite fingers, hand, or wrist OR the real hand to operate or control the prosthetic arm. This is a simulation.
See Activity Sheet for instructions to create one finger with two joints. Your group may create the finger with additional joints.
After creating one finger, your group will create another one or more fingers.
Use the remaining supplies to create the arm and the operation of the fingers.
Attach the prosthetic arm and pick up the different objects from a table one at a time and release.

16. Activity: The Pick-Up Challenge
Supplies per Group:
2 cups
3 ft of string
10 rubber bands
1 pair plastic glove
10 craft sticks
2 sheets of paper
10 straws
General Supplies:
Scissors
Masking tape
Various objects to pick up
Objective:
To design and build a prosthetic arm device to safely pick up things.

17. Activity: The Pick-Up Challenge
Prosthetic arm must be a working model with moveable parts. Tape cannot be used by itself or as a “lasso” to pick up objects.
Must be able to pick up objects without outside assistance.
Device must be self-contained (e.g., device cannot be anchored or tethered).
Device must be controlled using only one arm or opposite hand.

18. Resources / Contact Rules and curriculum at https://mesa.ucop.edu/
Teach Engineering at
Ben Louie
USC MESA