Enhanced balance associated with coordination training with stochastic resonance stimulation in subjects with functional ankle instability: an experimental trial

Ross, Scott E.; Arnold, Brent L.; Blackburn, J. Troy; Brown, Cathleen N.; Guskiewicz, Kevin M.

doi:10.1186/1743-0003-4-47

Cited by 68 publications

(63 citation statements)

References 32 publications

(78 reference statements)

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“…The SR effect in tactile sensitivity has also been confirmed in feet [12], [13], hands and fingers [14], [15], and improved tactile sensitivity is known to influence the sensorimotor functions of humans [7], [8]. It has further been reported that SR improves balance control in humans [16], [17]. .…”

Section: Introductionmentioning

confidence: 77%

Wearable sensorimotor enhancer for a fingertip based on stochastic resonance

Kurita

Shinohara

Ueda

2011

2011 IEEE International Conference on Robotics and Automation

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Abstract-This paper reports on the results of an experiment involving a wearable sensorimotor enhancer intended to improve tactile sensitivity in human fingertips. As briefly exposing tactile receptors to sub-sensory vibration is known to enhance tactile sensitivity thanks to a phenomenon called stochastic resonance (SR) in the somatosensory system, applying white-noise vibration to a fingertip is expected to improve the sense of touch and associated motor skills. Against such a background, a prototype of a wearable device called a sensorimotor enhancer is proposed here. The device is attached to the radial side of the fingertip and stimulates tactile receptors by applying vibration from a lead zirconate titanate (PZT) piezoelectric stack actuator. This design keeps the palmar region free, thereby helping to maintain the wearer's manipulative ability. Sensory and motor tests involving 11 human subjects were conducted to determine the efficacy of the device, and the results confirmed its usefulness.

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Section: Introductionmentioning

confidence: 77%

Wearable sensorimotor enhancer for a fingertip based on stochastic resonance

Kurita

Shinohara

Ueda

2011

2011 IEEE International Conference on Robotics and Automation

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“…We used MATLAB (version R2008A; The MathWorks, Inc, Natick, MA) to compute the COP data using the formulae provided in Table 2. 38 …”

Section: Center-of-pressure Measurementmentioning

confidence: 99%

“…The COP sway area represented the maximal anterior, posterior, medial, and lateral sways during a given time. 38 Before data acquisition, automatic calibration was implemented based on each participant's body weight. The COP data were acquired at a sampling rate of 40 Hz for 10 seconds while the participant maintained equilibrium as stably as possible during the unipedal postural-stability test.…”

Section: Center-of-pressure Measurementmentioning

confidence: 99%

Intensive Abdominal Drawing-In Maneuver After Unipedal Postural Stability in Nonathletes With Core Instability

Lee

You

Kim

et al. 2015

Journal of Athletic Training

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Context:The exact neuromechanical nature and relative contribution of the abdominal drawing-in maneuver (ADIM) to postural instability warrants further investigation in uninjured and injured populations.Objective: To determine the effects of the ADIM on static core and unipedal postural stability in nonathletes with core instability.Design: Controlled laboratory study. Setting: University research laboratory. Patients or Other Participants: A total of 19 nonathletes (4 women: age ¼ 22.3 6 1.3 years, height ¼ 164.0 6 1.7 cm, mass ¼ 56.0 6 4.6 kg; 15 men: age ¼ 24.6 6 2.8 years, height ¼ 172.6 6 4.7 cm, mass ¼ 66.8 6 7.6 kg) with core instability.Intervention(s): Participants received ADIM training with visual feedback 20 minutes each day for 7 days each week over a 2-week period.Main Outcome Measures(s): Core instability was determined using a prone formal test and measured by a pressure biofeedback unit. Unipedal postural stability was determined by measuring the center-of-pressure sway and associated changes in the abdominal muscle-thickness ratios. Electromyographic activity was measured concurrently in the external oblique, erector spinae, gluteus medius, vastus medialis oblique, tibialis anterior, and medial gastrocnemius muscles.Results: All participants initially were unable to complete the formal test. However, after the 2-week ADIM training period, all participants were able to reduce the pressure biofeedback unit by a range of 4 to 10 mm Hg from an initial 70 mm Hg and maintain it at 60 to 66 mm Hg with minimal activation of the external oblique (t 18 ¼ 3.691, P ¼ .002) and erector spinae (t 18 ¼ 2.823, P ¼ .01) muscles. Monitoring of the pressure biofeedback unit and other muscle activations confirmed that the correct muscle contraction defining the ADIM was accomplished. This core stabilization was well maintained in the unipedal-stance position, as evidenced by a decrease in the center-of-pressure sway measures (t 18 range, 3.953-5.775, P , .001), an increased muscle-thickness ratio for the transverse abdominis (t 18 ¼ À2.327, P ¼ .03), and a reduction in external oblique muscle activity (t 18 ¼ 3.172, P ¼ .005).Conclusions: We provide the first evidence to highlight the positive effects of ADIM training on core and postural stability in nonathletes with core instability.Key Words: center of pressure, core stabilization, formal test Key PointsStatic core stability and unipedal postural stability were enhanced in nonathletes with core instability after abdominal drawing-in maneuver training augmented with rehabilitation ultrasound imaging and electromyographic feedback. Abdominal drawing-in maneuver training using rehabilitation ultrasound imaging and electromyography effectively improved morphologic changes in transverse abdominis muscle thickness and the neuromuscular pattern of an overactive superficial external oblique muscle, contributing to static core stability and unipedal postural stability. Researchers should further investigate the relationship between dynamic core and unipedal postural sta...

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“…[18][19][20][21][22][23] Furthermore, when applied during static and dynamic balance, SRS has improved balance immediately. 18,20,23 Recent results 23 also indicate that customizing the stimulation intensity for individuals may enhance the treatment effects associated with SRS.…”

mentioning

confidence: 99%

“…[18][19][20][21][22][23] This therapy introduces subsensory mechanical or electrical noise through the skin to enhance the ability of the mechanoreceptors to detect and transmit weak sensory signals. [24][25][26] This subsensory noise can stimulate the mechanoreceptors to bring membrane potentials closer to threshold by changing ion permeability.…”

mentioning

confidence: 99%

Noise-Enhanced Eversion Force Sense in Ankles With or Without Functional Instability

Ross

Linens

Wright

et al. 2015

Journal of Athletic Training

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Context: Force sense impairments are associated with functional ankle instability. Stochastic resonance stimulation (SRS) may have implications for correcting these force sense deficits.Objective: To determine if SRS improved force sense. Design: Case-control study. Setting: Research laboratory.Patients or Other Participants: Twelve people with functional ankle instability (age ¼ 23 6 3 years, height ¼ 174 6 8 cm, mass ¼ 69 6 10 kg) and 12 people with stable ankles (age ¼ 22 6 2 years, height ¼ 170 6 7 cm, mass ¼ 64 6 10 kg).Intervention(s): The eversion force sense protocol required participants to reproduce a targeted muscle tension (10% of maximum voluntary isometric contraction). This protocol was assessed under SRS on and SRS off (control) conditions. During SRS on , random subsensory mechanical noise was applied to the lower leg at a customized optimal intensity for each participant.Main Outcome Measure(s): Constant error, absolute error, and variable error measures quantified accuracy, overall performance, and consistency of force reproduction, respectively.Results: With SRS, we observed main effects for force sense absolute error (SRS off ¼ 1.01 6 0.67 N, SRS on ¼ 0.69 6 0.42 N) and variable error (SRS off ¼ 1.11 6 0.64 N, SRS on ¼ 0.78 6 0.56 N) (P , .05). No other main effects or treatment-bygroup interactions were found (P . .05).Conclusions: Although SRS reduced the overall magnitude (absolute error) and variability (variable error) of force sense errors, it had no effect on the directionality (constant error). Clinically, SRS may enhance muscle tension ability, which could have treatment implications for ankle stability.

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Enhanced balance associated with coordination training with stochastic resonance stimulation in subjects with functional ankle instability: an experimental trial

Cited by 68 publications

References 32 publications

Wearable sensorimotor enhancer for a fingertip based on stochastic resonance

Wearable sensorimotor enhancer for a fingertip based on stochastic resonance

Intensive Abdominal Drawing-In Maneuver After Unipedal Postural Stability in Nonathletes With Core Instability

Noise-Enhanced Eversion Force Sense in Ankles With or Without Functional Instability

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