Perturbation apparatus for proprioceptive and reactive balance training

A portable perturbation device for proprioceptive and reactive balance training and therapy, comprising:

• a. a generally stationary base having a base upper surface and a base sidewall extending upwardly from the outer edge of said base upper surface and defining a cavity;
• b. a moveable assembly configured to be positioned on said base upper surface within said cavity and having a generally horizontal surface configured to be stood upon by a user, said movable assembly being linearly and rotatably movable with respect to said base;
• c. a manipulable assembly connected to said movable assembly and configured for manipulation by a manipulation means to effect movement of said movable assembly;
• and
• d. a linear movement adjustment device wherein said adjustment device restricts linear movement of said movable assembly with respect to said base and comprises:
• i. a first disc having an upper surface, a lower surface, and at least one slot extending through said first disc;
• ii. a second disc having an upper surface, a lower surface, having at least one aperture extending through said second disc, wherein said first disc lower surface faces said second disc upper surface and wherein said first disc is rotatable with respect to said second disc;
• iii. at least one adjustment ring having an upper surface and lower surface and positioned below said second disc such that said upper surface of said adjustment ring faces said lower surface of said second disc;
• and
• iv. at least one pin inserted through said first disc, such that when said first disc is rotated with respect to said second disc such that said pin is aligned with said aperture, said pin is pushed through said aperture by a spring force such that said pin engages said upper surface of said adjustment ring and pushes said adjustment ring downward.