Examinando por Autor "Linsambarth, Sergio"

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  • Miniatura
    Ítem
    Retrospective evaluation of deep transcranial magnetic stimulation as add-on treatment for Parkinson's disease
    (Frontiers Research Foundation, 2015-10) Torres, Francisco; Villalon, Esteban; Poblete, Patricio; Moraga-Amaro, Rodrigo; Linsambarth, Sergio; Riquelme, Raúl; Zangen, Abraham; Stehberg, Jimmy
    Objective: To evaluate the safety and assess the different symptom improvements found after a combined low-frequency primary motor cortex and high-frequency prefrontal cortex (PFC) stimulation using the deep TMS (dTMS) H-coil, as an add-on treatment for Parkinson's disease (PD). Methods: Forty-five PD patients underwent 14 dTMS sessions; each consisting of 1 Hz stimulation of the primary motor cortex for 15 min, followed by 10 Hz stimulation of the PFC for 15 min. Clinical assessments were performed, BEFORE, at the MIDDLE, and END of therapy as well as at FOLLOW-UP after 30 days, using Movement Disorder Society-Unified Parkinson's Disease Rating Scale, TINETTI, UP&GO, SCOPA, HDRS 21, Beck Depression Inventory, and self-applied daily motor assessment scales. Results: Treatment was well-tolerated, without serious adverse effects. dTMS-induced significant PD symptom improvements at END and at FOLLOW-UP, in all subscales of the UPDRS, gait speed, depressive symptoms, balance, autonomic symptoms, and a 73% increase in daily ON time. Conclusion: In the cohort of PD patients treated, dTMS was well-tolerated with only minor adverse effects. The dTMS-induced significant improvements in motor, postural, and motivational symptoms of PD patients and may potentiate concurrent levodopa treatment. Significance: The present study demonstrates that dTMS may have a much wider spectrum of beneficial effects than previously reported for TMS, including enhancement of levodopa effects, suggesting that future clinical trials with dTMS should include a broader range of symptom measurements. © 2015 Torres, Villalon, Poblete, Moraga-Amaro, Linsambarth, Riquelme, Zangen and Stehberg.
  • Miniatura
    Ítem
    The role of the rodent insula in anxiety
    (Frontiers Media S.A., 2019-03) Méndez Ruette, Maxs; Linsambarth, Sergio; Moraga Amaro, Rodrigo; Quintana Donoso, Daisy; Méndez, Luis; Tamburini, Giovanni; Cornejo, Francisca; Torres, Rodrigo F.; Stehberg, Jimmy
    The human insula has been consistently reported to be overactivated in all anxiety disorders, activation which has been suggested to be proportional to the level of anxiety and shown to decrease with effective anxiolytic treatment. Nonetheless, studies evaluating the direct role of the insula in anxiety are lacking. Here, we set out to investigate the role of the rodent insula in anxiety by either inactivating different insular regions via microinjections of glutamatergic AMPA receptor antagonist CNQX or activating them by microinjection of GABA receptor antagonist bicuculline in rats, before measuring anxiety-like behavior using the elevated plus maze. Inactivation of caudal and medial insular regions induced anxiogenic effects, while their activation induced anxiolytic effects. In contrast, inactivation of more rostral areas induced anxiolytic effects and their activation, anxiogenic effects. These results suggest that the insula in the rat has a role in the modulation of anxiety-like behavior in rats, showing regional differences; rostral regions have an anxiogenic role, while medial and caudal regions have an anxiolytic role, with a transition area around bregma +0.5. The present study suggests that the insula has a direct role in anxiety. © 2019 Méndez-Ruette, Linsambarth, Moraga-Amaro, Quintana-Donoso, Méndez, Tamburini, Cornejo, Torres and Stehberg.