Stefania De Curtis

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Single-unit activity was recorded in the rat neostriatum at different distances from the point of an infusion of either glutamate or serotonin. In each case, firing rate at the distant site (0.8-1.5 mm) was the mirror image of that at the near site (0.1-0.3 mm). These reciprocal changes were blocked by a subsequent injection of haloperidol, a dopamine(More)
We discuss possible symmetries of effective theories describing spinless and spin 1 bosons, mainly to concentrate on an intriguing phenomenological possibility: that of a hardly noticeable strong electroweak sector at relatively low energies. Specifically, a model with both vector and axial vector strong interacting bosons may possess a discrete symmetry(More)
We consider a description of propagators for particle resonances which takes into account the quantum mechanical interference due to the width of two or more nearby states that have common decay channels, by incorporating the effects arising from the imaginary parts of the one-loop self-energies. Depending on the couplings to the common decay channels, the(More)
We discuss the possible symmetries of the effective lagrangian describing interacting pseudoscalar-, vector-, and axial-vector mesons. Specific choices of the parameters give rise to an [SU(2) ⊗ SU(2)] symmetry. This symmetry can be obtained either á la Georgi, with all states in the spectrum remaining massless, or in a new realization, implying decoupling(More)
For an attractive class of dynamical symmetry breaking (technicolor) models, the lightest neutral pseudo-Nambu-Goldstone boson (P 0) contains only downtype techniquarks and charged technileptons. We discuss the prospects for discovering and studying the P 0 of such models at the Tevatron and the LHC and at future e+e− and μ+μ− colliders. Depending upon the(More)
A local infusion of d-amphetamine (d-AMPH) into the dorsal raphe nucleus (DRN) inhibited neuronal activity in this site and produced a mirror-image excitation in the ventrolateral, but not dorsomedial, neostriatum. This effect, which was mimicked by 5-methoxy-N,N-dimethyltryptamine, a serotonin autoreceptor agonist, was not altered by pretreatment with(More)
Previous reports indicate that amphetamine produces a dose-dependent shift to the firing rate of neurons in the anterior neostriatum that parallels the shift in behavior from locomotion to focused stereotypy. To determine if para-chlorophenylalanine (PCPA), which alters the pattern of the behavioral response to amphetamine, also changes the pattern of the(More)
A direct infusion of amphetamine into the dorsal raphe nucleus of the rat inhibited the activity of serotonergic neurons in this site. An intravenous injection of 5-methoxy-N,N-dimethyltryptamine, a serotonin autoreceptor agonist, mimicked this effect. The amphetamine-induced depression of firing rate was blocked by a subsequent injection of methiothepin, a(More)