APPROACH TO EQUILIBRIUM IN A LATTICE FIELD-THEORY

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INTERMITTENT BEHAVIOR IN NON-LINEAR-HAMILTONIAN SYSTEMS FAR FROM EQUILIBRIUM

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CALCULATION OF RELAXATION FUNCTIONS - A NEW DEVELOPMENT WITHIN THE MORI FORMALISM

The problem of expanding the correlation functions into continued fractions is considered in the light of a Mori-type formalism. First, we examine the techniques available in the literature for extracting the parameters of the Mori chain from the moments; then, on the basis of physical considerations, we provide a new surprisingly simple and efficient technique and discuss its significance. Some examples are given to illustrate the elegance and the convenience of our procedure

ON THE ONSET OF CHAOTIC MOTION IN TERMS OF GENERALIZED LANGEVIN-EQUATIONS

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Myoelectric manifestations of muscle changes in stroke patients

Abstract: Objective: To evaluate the development of myoelectric fatigue in paretic and healthy tibialis anterior muscles of stroke patients. Design: Case series. Setting: Occupational therapy and clinical neurophysiology unit. Participants: Eight patients with hemiparesis or hemiplegia 9 months to 10 years poststroke. Main Outcome Measures: Current pulses of 0.1-ms width and 40-Hz repetition rate were applied for 10 seconds with a monopolar technique; myoelectric signals (M waves) were detected with surface electrodes. Results: Mean values and initial values of the median frequency (MDF) between paretic and healthy side were statistically different, with the values on the healthy side much higher than the paretic side. Changes of MDF showed a decreasing pattern for both the paretic and the healthy sides, with the downslope of the curve of the healthy side more evident. Conclusions: In paretic muscles of stroke patients, the tendency toward atrophy of type II fibers appears to be frequent. Our study suggests this muscle rearrangement uses techniques much less invasive than muscle biopsy, and gives useful information about muscle function. This kind of information can help identify rehabilitation strategies, particularly for chronic stroke survivors