Stochastic resonance in human electroencephalographic activity elicited by mechanical tactile stimuli

Manjarrez, Elı́as; Diez-Martínez, Oscar; Méndez, Ignacio; Flores, Amira

doi:10.1016/s0304-3940(02)00212-4

Cited by 71 publications

(84 citation statements)

References 17 publications

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“…In humans, a first psychophysical study showed that application of noise increased the sensitivity to detect subthreshold tactile stimuli (Collins et al, 1996b). These reports motivated the analysis of SR on tactile evoked potentials in humans and cats (Manjarrez et al, 2002a(Manjarrez et al, ,b, 2003. SR effects were shown not only in the somatosensory, but also in visual and auditory systems (Simonotto et al, 1997;Jaramillo and Wiesenfeld, 1998;Volgushev and Eysel, 2000;Manjarrez et al, 2007;Aihara et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Improved Sensorimotor Performance via Stochastic Resonance

et al. 2012

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Several studies about noise-enhanced balance control in humans support the hypothesis that stochastic resonance can enhance the detection and transmission in sensorimotor system during a motor task. The purpose of the present study was to extend these findings in a simpler and controlled task. We explored whether a particular level of a mechanical Gaussian noise (0 -15 Hz) applied on the index finger can improve the performance during compensation for a static force generated by a manipulandum. The finger position was displayed on a monitor as a small white point in the center of a gray circle. We considered a good performance when the subjects exhibited a low deviation from the center of this circle and when the performance had less variation over time. Several levels of mechanical noise were applied on the manipulandum. We compared the performance between zero noise (ZN), optimal noise (ON), and high noise (HN). In all subjects (8 of 8) the data disclosed an inverted U-like graph between the inverse of the mean variation in position and the input noise level. In other words, the mean variation was significantly smaller during ON than during ZN or HN. The findings suggest that the application of a tactile-proprioceptive noise can improve the stability in sensorimotor performance via stochastic resonance. Possible explanations for this improvement in motor precision are an increase of the peripheral receptors sensitivity and of the internal stochastic resonance, causing a better sensorimotor integration and an increase in corticomuscular synchronization.

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Section: Introductionmentioning

confidence: 99%

Improved Sensorimotor Performance via Stochastic Resonance

et al. 2012

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“…This phenomenon has been demonstrated in the CNS (Gluckman et al 1996;Manjarrez et al 2002b;Durand 2000, 2001). In sensory systems, several SR type effects have been demonstrated in terms of the response amplitude or the signal-to-noise ratio of the output (Ando 2006;Bahar and Moss 2004;Collins et al 1996Collins et al , 1997Dhruv et al 2002;Hanggi 2002;Ivey et al 1998;Liu et al 2002;Manjarrez et al 2002aManjarrez et al , 2003Manjarrez et al , 2007Mori and Kai 2002;Moss et al 2004;Richardson et al 1998;Russell et al 1999;Ward et al 2002;Winterer et al 1999); however, there is no direct evidence about the existence of this phenomenon in the motor system.…”

Section: Introductionmentioning

confidence: 99%

Stochastic Resonance in the Motor System: Effects of Noise on the Monosynaptic Reflex Pathway of the Cat Spinal Cord

Martínez

Pérez²,

Mirasso³

et al. 2007

Journal of Neurophysiology

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Martinez L, Pérez T, Mirasso CR, Manjarrez E. Stochastic resonance in the motor system: effects of noise on the monosynaptic reflex pathway of the cat spinal cord. J Neurophysiol 97: 4007-4016, 2007. First published April 11, 2007 doi:10.1152/jn.01164.2006. In sensory systems, the presence of a particular nonzero level of noise may significantly enhance the ability of an individual to detect weak sensory stimuli through a phenomenon known as stochastic resonance (SR). The aim of this study was to demonstrate if such phenomenon is also exhibited by the motor system; in particular, in the Iamotoneuron synapse of the cat spinal cord. Monosynaptic reflexes elicited by periodic electrical stimulation to the medial gastrocnemius nerve were recorded in the L 7 ventral root (or in single motoneurons) of decerebrated cats. Random stretches (mechanical noise) were applied to the lateral gastrocnemius plus soleus muscle by means of a closed-loop mechanical stimulator-transducer. In all cats, we observed the SR phenomenon. The amplitude of the monosynaptic reflexes (or number of action potentials recorded in the motoneurons) evoked by the weak electrical stimuli applied to the medial gastrocnemius nerve were an inverted U-like function of the mechanical noise applied to the lateral gastrocnemius plus soleus muscle. A significant maximum value in the amplitude of the monosynaptic responses was reached with a particular noise amplitude value. Numerical simulations on a model of the monosynaptic reflex pathway qualitatively reproduce this stochastic resonance behavior. We conclude that the monosynaptic reflex response elicited by Ia afferents is optimized by the noisy stretching of a synergistic muscle. Our study provides the first direct demonstration that the motor system, and not only the sensory systems, exhibits the SR phenomenon.

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“…Direct evidence for the positive role of noise in acoustic and vestibular function has been reported in the literature (Yu and Lewis 1989;Morse and Evans 1996;Henry 1999). There are several possible mechanisms through which the SNR of afferent activity in hair cell organs may be enhanced.…”

Section: Discussionmentioning

confidence: 97%

“…In has been reasonably well established that noise can enhance detection in the nervous system for both periodic and aperiodic signals (Collins et al 1996;Jaramillo and Wiesenfeld 1998;Manjarrez et al 2002). Furthermore, SR has also been shown to enhance neuronal information encoding (measured in terms of Shannon's transinformation rate) (Levin and Miller 1996).…”

Section: Discussionmentioning

confidence: 99%

Mechanical Noise Enhances Signal Transmission in the Bullfrog Sacculus

Indresano

Frank

Middleton

et al. 2003

JARO - Journal of the Association for Research in Otolaryngolog

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Noise has been commonly thought to degrade the performance of sensory systems. However, it is now clear that the detection and transmission of weak signals in sensory systems can be enhanced by noise via stochastic resonance (SR). In hair cells, the quality of mechanoelectrical transduction is enhanced up to twofold by nanometer level mechanical noise acting on the hair bundle. We wanted to know whether these gains could be preserved, perhaps even enhanced, as information flows across hair cell synapses, and into the stream of action potentials that in the frog conveys acoustic information to the central nervous system. To approach this question, we studied the effects of noise on the signal-to-noise ratio (SNR) of the 8th nerve's response to small mechanical stimuli directly applied to the amphibian sacculus. We found that 2.5 nm of mechanical noise enhanced the response of the saccular nerve up to fourfold, suggesting that the positive effects of lowamplitude mechanical noise result in improved transmission of acoustic information.

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Stochastic resonance in human electroencephalographic activity elicited by mechanical tactile stimuli

Cited by 71 publications

References 17 publications

Improved Sensorimotor Performance via Stochastic Resonance

Improved Sensorimotor Performance via Stochastic Resonance

Stochastic Resonance in the Motor System: Effects of Noise on the Monosynaptic Reflex Pathway of the Cat Spinal Cord

Mechanical Noise Enhances Signal Transmission in the Bullfrog Sacculus

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