Prosthetic Arm 2019-2020

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.

How 3-D printed are changing kid’s lives around the world https://www.youtube.com/watch?v=XQ8tPOqN7WE

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

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

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

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

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

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

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

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.

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

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

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.

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.

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.

Resources / Contact Rules and curriculum at https://mesa.ucop.edu/ Teach Engineering at https://www.teachengineering.org/ Ben Louie USC MESA blouie@usc.edu