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Rogers, L.M., L. J. Welty, S. E. D’Andrea, P. K. Batchu, D. A. Brown (2006). “Effect of stochastic resonance applied to proximal leg muscles during cycling on soleus h-reflexes in persons with post-stroke hemiparesis”, Abstract and Poster, Society for Neuroscience 2006, Manuscript in Preparation.
CONCLUSIONS: Overall for subjects with chronic hemiparesis post-stroke, stochastic resonance stimulation (SR) applied to either the quadriceps or hamstring muscle of the paretic limb served to alter H-reflex excitability in the homonymous soleus muscle. Thus, in a system with sensorimotor losses, influencing the information content of signals from muscles with known impact on locomotor circuitry can affect a functionally relevant reflex pathway. These results support SR as a potential method for eliciting functional neuroplastic change post-stroke. |
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Priplata, A. A., B. L. Patritti, J. B. Niemi, R. Hughes, D. C. Gravell, L. A. Lipsitz, A. Veves, J. Stein, P. Bonato, J. J. Collins (2006). “Noise-enhanced balance control in patients with diabetes and patients with stroke.” Annals of Neurology, 59: 4–12.
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CONCLUSIONS: Noise-based devices could ameliorate diabetic and stroke impairments in balance control. |
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Ross, S. E., K. M. Guskiewicz (2006). “Effect of coordination training with and without stochastic resonance stimulation on dynamic postural stability of subjects with functional ankle instability and subjects with stable ankles.” Clinical Journal of Sport Medicine, 16: 323–328.
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CONCLUSIONS: Coordination training can improve dynamic postural instabilities associated with functional ankle instability (FAI). Stochastic resonance stimulation (SR) might be an alternative therapy for FAI, as this stimulation might improve dynamic postural stability more quickly and to a greater extent than coordination training without SR stimulation. |
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Khaodhiar, L., J. B. Niemi, R. Earnest, C. Lima, J. D. Harry and A. Veves (2003). “Enhancing sensation in diabetic neuropathic foot with mechanical noise.” Diabetes Care 26: 3280-3283.
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CONCLUSIONS: Mechanical noise stimulation improves vibration and tactile perception in diabetic patients with moderate to severe neuropathy.
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Priplata, A. A., J. B. Niemi, J. D. Harry, L. A. Lipsitz and J. J. Collins (2003). “Vibrating insoles and balance control in elderly people.” Lancet 362(9390): 1123-4.
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CONCLUSIONS: Noise-based devices, such as randomly vibrating insoles, could ameliorate age-related impairments in balance control. |
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Dhruv, N. T., J. B. Niemi, J. D. Harry, L. A. Lipsitz and J. J. Collins (2002). “Enhancing tactile sensation in older adults with electrical noise stimulation.” Neuroreport 13(5): 597-600.
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CONCLUSIONS: Electrical noise-based techniques may enable people to overcome functional difficulties due to age-related sensory loss. |
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Liu, W., L. A. Lipsitz, M. Montero-Odasso, J. Bean, D. C. Kerrigan and J. J. Collins (2002). “Noise-enhanced vibrotactile sensitivity in older adults, patients with stroke, and patients with diabetic neuropathy.” Archives of Physical Medicine and Rehabilitation, 83(2): 171-6.
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CONCLUSIONS: Reduced vibrotactile sensitivity in older adults, patients with stroke, and patients with diabetic neuropathy can be significantly improved with input mechanical noise. Noise-based techniques and devices may prove useful in overcoming age- and disease-related losses in sensorimotor function. |
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Gravelle, D. C., C. A. Laughton, N. T. Dhruv, K. D. Katdare, J. B. Niemi, L. A. Lipsitz and J. J. Collins (2002). “Noise-enhanced balance control in older adults.” Neuroreport 13(15): 1853-6.
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CONCLUSIONS: imperceptible electrical noise, when applied to the knee, can enhance the balance performance of healthy older adults. These findings suggest that electrical noise-based devices may be effective in improving balance control in elderly people. |
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Priplata, A., J. B. Niemi, M. Salen, J. D. Harry, L. A. Lipsitz and J. J. Collins (2002). “Noise-Enhanced Human Balance Control.” Physical Review Letters 89(23).
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CONCLUSIONS: Input noise can be used to improve motor control in humans. Specifically, we show that the postural sway of both young and elderly individuals during quiet standing can be significantly reduced by applying subsensory mechanical noise to the feet. We further demonstrate with input noise a trend towards the reduction of postural sway in elderly subjects to the level of young subjects. These results suggest that noise-based devices, such as randomly vibrating shoe inserts, may enable people to overcome functional difficulties due to age-related sensory loss. |
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Richardson, K., T. Imhoff, P. Grigg and J. Collins (1998). “Using electrical noise to enhance the ability of humans to detect subthreshold mechanical cutaneous stimuli.” Chaos 8: 599-603.
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CONCLUSIONS: Input electrical noise can serve as a negative masker for subthreshold mechanical tactile stimuli, i.e., electrical noise can increase the detectability of weak mechanical signals. Thus, for SR-type effects to be observed in human sensory perception, the noise and stimulus need not be of the same modality. From a bioengineering and clinical standpoint, this work suggests that an electrical noise-based technique could be used to improve tactile sensation in humans when the mechanical stimulus is around or below threshold. |
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Collins, J. J., T. T. Imhoff and P. Grigg (1996). “Noise-enhanced tactile sensation [letter].” Nature 383(6603): 770.
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Cordo, P., J. T. Inglis, S. Verschueren, J. J. Collins, D. M. Merfeld, S. Rosenblum, S. Buckley and F. Moss (1996). “Noise in human muscle spindles [letter].” Nature 383(6603): 769-70.
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