1. Proprioception Testing Device
Lee C. Groeneweg, EGR
Thomas A. Farley, EGR
Steve Brodnicki, SPT
Ryane Eno, SPT
Mike Terrell, SPT

2. Definition of Proprioception
Joint position sense without visual input
Measurements help inform physical therapist of patient’s ability to determine limb location in space
Also helpful in determining whether therapy interventions are necessary

3. Project Overview
Device to isolate and measure internal and external rotation of shoulder joint
Internal Shoulder Rotation
External Shoulder Rotation

4. Statement of Need
Device to isolate and measure internal and external rotation of shoulder joint
Must measure degrees similar to physical therapist’s goniometer
Test position must be self restraining (Locking)

5. Project Specifications
Isolation and measurement of shoulder internal and external rotation
Position of body - lying down on table
No computer technology
Easily used in a clinical setting
Portable and light
Measurement in degrees
Inexpensive
Test position must be self restraining (Locking)

6. Design Constraints Patient positioned lying on back
Shoulder blade must be immobilized
Upper arm positioned 90° to body
restrained
allowing longitudinal motion
in a resting position
Elbow must be positioned 90° to upper arm

7. Prototype Stage Discuss ideas 2-D CAD drawings Foam poster board
Convey 3-D concept
Receive approval

8. Production Stage Approval of prototype design Updated 2-D CAD drawings
Process plan for manufacturing
Obtain material
Manufacture parts
Assemble parts for fit
Test for proper function

9. Materials of Choice Aluminum Plastic Standard Fasteners Camera Tripod
Mini Laser Pointers
Ergonomic Knob

10. Manufactured Parts Base Plate Slider Brackets (2) Pivot bracket
Upper Laser pen holder
Lower laser Pen Holder
Armature

11. Manufacturing Process Plan
Base Plate
Cut to rough size on band saw
Machined to finished size on vertical mill
Holes drilled using vertical mill
Slots machined using 4 flute 1/4" cutter on vertical mill
Surface finished with manual disk grinder to remove all surface imperfections

12. Manufacturing Process Plan
Slider Brackets (2)
Cut to rough size on band saw
Machined to finished size on vertical mill
Holes drilled using vertical mill
Slots machined using 4 flute 1/4" cutter on vertical mill
Threads hand tapped

13. Manufacturing Process Plan
Pivot Bracket
Cut to rough size on band saw
Machined to finished size on vertical mill
Holes drilled using vertical mill
Counter bored holes machined using 4 flute 1/2" cutter on vertical mill

14. Manufacturing Process Plan
Upper Laser Pen Holder
Cut to size on band saw
Holes drilled using drill press
Lower Laser Pen Holder

15. Manufacturing Process Plan
Armature
Machined to finished size on vertical mill
Holes drilled using vertical mill
Slots machined using 4 flute 1/4" cutter on vertical mill

16. Features & Benefits Adjustable for multiple users
Lightweight materials
Fully Collapsible
Portable while assembled
Design is a baseline for future devices

17. Demonstration of Proprioception
Blind fold individual
Place the limb into a test position
Hold in test position for a few seconds
Record angle of test position
Return to starting position
Patient places limb into the testing position
Record angle of repeated attempt

18. Q and A Session Lee C. Groeneweg, EGR Thomas A. Farley, EGR
Steve Brodnicki, SPT
Ryane Eno, SPT
Mike Terrell, SPT
For addt’'l project info: