Diversity-Induced Resonance

Tessone, Claudio J.; Mirasso, Claudio R.; Toral, Raúl; Gunton, J. D.

doi:10.1103/physrevlett.97.194101

Cited by 230 publications

(205 citation statements)

References 13 publications

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“…The most intriguing part of the phenomenon is that noise (a source of disorder) can favor the amplification of a signal, an effect that usually requires a very precise synchrony (order). Recently in [11], it has been shown that even in absence of noise a similar beneficial effects can be observed. There, different sources of diversity plays the role of the noise, inducing a resonant collective behavior.…”

mentioning

confidence: 86%

“…The two possible solutions for the nodes Eq. (5), namely oscillations around ±1, affect the dynamics of the hub as a quenched disorder represented by λη i , and is equivalent to the diversity studied in [11]. Strictly speaking, the central limit theorem allows us to state that in the limit N → ∞, η i behaves as a random variable governed by a gaussian probability distribution with variance σ 2 = N − 1.…”

mentioning

confidence: 99%

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Amplified Signal Response in Scale-Free Networks by Collaborative Signaling

Acebrón

Lozano²,

Arenas³

2007

Phys. Rev. Lett.

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confidence: 86%

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confidence: 99%

Amplified Signal Response in Scale-Free Networks by Collaborative Signaling

Acebrón

Lozano²,

Arenas³

2007

Phys. Rev. Lett.

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“…Such diversity can be expected to lead to more robust operation of the system under variation of external conditions, due to the averaging of the neuronal responses. Diversity has also been proposed as a sourceofregular behavior in nonlinear systems (Tessone et al, 2006).…”

Section: Figurementioning

confidence: 99%

An Intersegmental Neuronal Architecture for Spinal Wave Propagation under Deletions

Pérez¹,

Tapia²,

Mirasso³

et al. 2009

J. Neurosci.

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Recent studies have established and characterized the propagation of traveling electrical waves along the cat spinal cord during scratching, but the neuronal architecture that allows for the persistence of such waves even during periods of absence of bursts of motoneuron activity (deletions) is still unclear. Here we address this problem both theoretically and experimentally. Specifically, we monitored during long lasting periods of time the global electrical activity of spinal neurons during scratching. We found clear deletions of unaltered cycle in extensor activity without associated deletions of the traveling spinal wave. Furthermore, we also found deletions with a perturbed cycle associated with a concomitant absence of the traveling spinal wave. Numerical simulations of an asymmetric two-layer model of a central-pattern generator distributed longitudinally along the spinal cord qualitatively reproduce the sinusoidal traveling waves, and are able to replicate both classes of deletions. We believe these findings shed light into the longitudinal organization of the central-pattern generator networks in the spinal cord.

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“…It has been recently shown that diversity might play an important role in forced excitatory systems, equivalent to the one played by noise in the stochastic resonance phenomena (Tessone et al 2006). Tessone et al (2006) demonstrated that the response of a system to an external weak periodic signal can be optimized by an intermediate level of diversity between the elements composing the system even in the absence of any other noise source. Consequently, diversity (represented by a quenched noise) and stochastic noise seem to play qualitatively the same role.…”

Section: Mathematical Formulas and Model Parameters Used In Computer mentioning

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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Diversity-Induced Resonance

Cited by 230 publications

References 13 publications

Amplified Signal Response in Scale-Free Networks by Collaborative Signaling

Amplified Signal Response in Scale-Free Networks by Collaborative Signaling

An Intersegmental Neuronal Architecture for Spinal Wave Propagation under Deletions

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

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