Fryette’s laws teaching tool 3D for print
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“Fryette’s Laws” are a set of guiding principles used by physiotherapists and practitioners of osteopathic medicine to discriminate between dysfunctions in the axial skeleton. The coupled movements can be tricky to visualize, and especially difficult to explain to patients.
In this model, the central vertebrae represents the spine in neutral and demonstrates the first principle:
“Principle I: When the spine is in neutral, sidebending to one side will be accompanied by horizontal rotation to the opposite side.”
The front and back vertebrae represent the spine in flexion and extension respectively. These vertebrae demonstrate the second principle:
“Principle II: When the spine is in a flexed or extended position (non-neutral), sidebending to one side will be accompanied by rotation to the same side.”
See here for more details on Fryette’s Laws: https://en.wikipedia.org/wiki/Fryette%27s_laws
Printing
Print three “Gear” files and one of each of the remaining files. You'll need three 1/8" fine thread bolts, 3/4" in length. Refer to the video for assembly instructions, paying particular attention to proper orientation of the base. For the slots that hold the front and back vertebrae, the teeth should be on the back edge of the slot. For the slot that holds the central vertebrae, the teeth should be on the front edge of the slot.
See here for another spherical cam project: https://www.thingiverse.com/thing:4884439
Here are more of my anatomical designs you might enjoy:
Novelty:
Wearable Spine: https://www.thingiverse.com/thing:4982223
Skull Jewelry Set: https://www.thingiverse.com/thing:4980129
Happy Halloween Spine: https://www.thingiverse.com/thing:4979522
Eyeball Windchime: https://www.thingiverse.com/thing:4978632
Fingerbone Windchime: https://www.thingiverse.com/thing:4962956
Skull Windchime: https://www.thingiverse.com/thing:4962814
Creepy Custom Embossed Spine: https://www.thingiverse.com/thing:4916377
Mini Articulating Spine Keychain: https://www.thingiverse.com/thing:4891846
Big Bowl O’ Back Bones: https://www.thingiverse.com/thing:4881377
Vertebral Stacking Blocks: https://www.thingiverse.com/thing:4868387
Anatomically Correct Voronoi Heart: https://www.thingiverse.com/thing:4636146
Vertebrae with Secret Compartment: https://www.thingiverse.com/thing:4633188
Brain Puzzle: https://www.thingiverse.com/thing:4158232
Anatomical Heart Puzzle: https://www.thingiverse.com/thing:4146688
Educational:
6-Piece Magnetic Female Pelvis Model: https://www.thingiverse.com/thing:4946668
Fryette’s Laws Teaching Tool: https://www.thingiverse.com/thing:4887712
Hip and Pelvis Model: https://www.thingiverse.com/thing:4875641
Flexible Three-Quarter Spine Model with Display Stand: https://www.thingiverse.com/thing:4863003 Full Size Anatomically Correct Human Foot Model: https://www.thingiverse.com/thing:4849504
Full Size Anatomically Correct Human Hand Model: https://www.thingiverse.com/thing:4841107
Full Size Anatomically-Correct 18-Piece Magnetic Human Skull Model: https://www.thingiverse.com/thing:4830026
Full-sized Anatomically Correct Articulating Spine: https://www.thingiverse.com/thing:4801717
Articulating Lumbar Vertebrae: https://www.thingiverse.com/thing:4637241
Designer
DaveMakesStuff3d model description
This teaching tool uses spherical cams to help visualize the coupled biomechanical movements that occur in the lumbar and thoracic spine during moveme...nt. See here for video and assembly sequence: https://youtu.be/jYGLIR5nwPY“Fryette’s Laws” are a set of guiding principles used by physiotherapists and practitioners of osteopathic medicine to discriminate between dysfunctions in the axial skeleton. The coupled movements can be tricky to visualize, and especially difficult to explain to patients.
In this model, the central vertebrae represents the spine in neutral and demonstrates the first principle:
“Principle I: When the spine is in neutral, sidebending to one side will be accompanied by horizontal rotation to the opposite side.”
The front and back vertebrae represent the spine in flexion and extension respectively. These vertebrae demonstrate the second principle:
“Principle II: When the spine is in a flexed or extended position (non-neutral), sidebending to one side will be accompanied by rotation to the same side.”
See here for more details on Fryette’s Laws: https://en.wikipedia.org/wiki/Fryette%27s_laws
Printing
Print three “Gear” files and one of each of the remaining files. You'll need three 1/8" fine thread bolts, 3/4" in length. Refer to the video for assembly instructions, paying particular attention to proper orientation of the base. For the slots that hold the front and back vertebrae, the teeth should be on the back edge of the slot. For the slot that holds the central vertebrae, the teeth should be on the front edge of the slot.
See here for another spherical cam project: https://www.thingiverse.com/thing:4884439
Here are more of my anatomical designs you might enjoy:
Novelty:
Wearable Spine: https://www.thingiverse.com/thing:4982223
Skull Jewelry Set: https://www.thingiverse.com/thing:4980129
Happy Halloween Spine: https://www.thingiverse.com/thing:4979522
Eyeball Windchime: https://www.thingiverse.com/thing:4978632
Fingerbone Windchime: https://www.thingiverse.com/thing:4962956
Skull Windchime: https://www.thingiverse.com/thing:4962814
Creepy Custom Embossed Spine: https://www.thingiverse.com/thing:4916377
Mini Articulating Spine Keychain: https://www.thingiverse.com/thing:4891846
Big Bowl O’ Back Bones: https://www.thingiverse.com/thing:4881377
Vertebral Stacking Blocks: https://www.thingiverse.com/thing:4868387
Anatomically Correct Voronoi Heart: https://www.thingiverse.com/thing:4636146
Vertebrae with Secret Compartment: https://www.thingiverse.com/thing:4633188
Brain Puzzle: https://www.thingiverse.com/thing:4158232
Anatomical Heart Puzzle: https://www.thingiverse.com/thing:4146688
Educational:
6-Piece Magnetic Female Pelvis Model: https://www.thingiverse.com/thing:4946668
Fryette’s Laws Teaching Tool: https://www.thingiverse.com/thing:4887712
Hip and Pelvis Model: https://www.thingiverse.com/thing:4875641
Flexible Three-Quarter Spine Model with Display Stand: https://www.thingiverse.com/thing:4863003 Full Size Anatomically Correct Human Foot Model: https://www.thingiverse.com/thing:4849504
Full Size Anatomically Correct Human Hand Model: https://www.thingiverse.com/thing:4841107
Full Size Anatomically-Correct 18-Piece Magnetic Human Skull Model: https://www.thingiverse.com/thing:4830026
Full-sized Anatomically Correct Articulating Spine: https://www.thingiverse.com/thing:4801717
Articulating Lumbar Vertebrae: https://www.thingiverse.com/thing:4637241
