Glabrous Skin Stimulation Surface for Pressure-Proportional Proprioception
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Solution Overview
Problem
Existing methods for stimulating cutaneous receptors in glabrous skin, such as those in the feet and hands, do not effectively increase proprioception and balance in proportion to applied pressure, and lack durable, flexible, and efficient mechanisms for enhancing mechanoreception.
Innovation Solution
A mechanoreception stimulation fabric with pyramidal protuberances affixed to the interior surface, spaced to maximize stimulation of targeted receptive fields, increasing proprioception and balance by enhancing afferent signaling in proportion to applied pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If textured insoles with large nodules are used to stimulate plantar receptors, then balance control is improved, but the stimulation does not increase in proportion to applied pressure and the nodules are relatively large in diameter
Solution Approach 1:
The patent changes the key parameters of the stimulation elements: reducing diameter from millimeters to micrometers (e.g., 10-100 micrometers), increasing density (100-10,000 elements per square inch), and adjusting height (1-10 micrometers). These parameter changes enable the surface to provide pressure-proportional stimulation while maintaining durable contact with the skin, resolving the contradiction between reliable balance control and adaptable pressure response.
Solution Approach 2:
The patent applies different local qualities to different regions of the insole by varying the density, height, and distribution of protrusion elements across different plantar regions. This allows optimized stimulation for specific receptive fields while maintaining overall balance control, addressing both the reliability and adaptability requirements.
2Reliability
If protuberances are made hard to effectively stimulate receptors, then mechanoreception is enhanced, but the fabric loses flexibility and stretchability
Solution Approach 1:
The patent uses composite materials: a flexible fabric substrate combined with hard protrusion elements (such as plastic, metal, or ceramic beads, domes, or spikes). This composite structure allows the fabric to maintain its flexibility and stretchability while the hard protrusions provide effective mechanical stimulation of cutaneous receptors, resolving the contradiction between reliable mechanoreception and fabric adaptability.
Solution Approach 2:
The stimulation function is segmented from the fabric structure: the fabric provides flexibility and comfort, while discrete protrusion elements provide the hard stimulation contact. This segmentation allows each component to optimize its function without compromising the other, enabling both reliable mechanoreception and fabric flexibility.
3Reliability
If protuberances are spaced closely to maximize receptor stimulation, then proprioception is enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs self-organizing or self-aligning mechanisms in the manufacturing process. For example, protrusion elements may be applied as a suspension that settles into uniform distribution, or using modal compounds that naturally form regular patterns. This self-service approach achieves the required close spacing (100-10,000 elements per square inch) without requiring extremely precise manual placement, reducing manufacturing precision requirements while maintaining reliable proprioception enhancement.
Solution Approach 2:
The patent specifies parameter ranges rather than exact values for protuberance spacing and density (e.g., 100-10,000 elements per square inch, heights of 1-10 micrometers). This parameter-based specification provides manufacturing flexibility while ensuring effective stimulation, allowing standard manufacturing tolerances to achieve the required proprioception enhancement without excessive precision requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The fabric increases proprioception and balance by stimulating cutaneous receptors in proportion to pressure, reducing sway and fatigue, and enhancing perception and blood flow, particularly when worn as socks or gloves.
Implementation Method 1
A mechanoreception stimulation fabric with pyramidal protuberances affixed to the interior surface, spaced to maximize stimulation of targeted receptive fields, increasing proprioception and balance by enhancing afferent signaling in proportion to applied pressure
Data Source
AI summary
Methods for increasing proprioception of a person including stimulating cutaneous receptors in glabrous skin of a person are provided, wherein the method includes contacting cutaneous receptors in glabrous skin of a person with a somatosensation and proprioceptor stimulation surface having a plurality of protuberances which are projected upwardly from the stimulation surface and which are configured to stimulate cutaneous receptors in the glabrous skin of the person when pressed in contact with the glabrous skin of the person to increase proprioception of the person, wherein the plurality of protuberances are configured to increase stimulation to cutaneous receptors proportionately with pressure applied when the protuberances are pressed in contact with the glabrous skin of the person, wherein the protuberances comprise an acute apex; a medial portion; and a base; and wherein the protuberances are not more than 1 mm apart between bases, have a Shore hardness of approximately 60 A or harder, have a pyramidal shape, and are not more than 5 mm apart between apices, wherein the stimulation surface is not in the form of a mat or a flooring material.