FELIPE DALESSANDRO FERREIRA CORCHS
Projetos de Pesquisa
Unidades Organizacionais
Instituto de Psiquiatria, Hospital das Clínicas, Faculdade de Medicina - Médico
3 resultados
Resultados de Busca
Agora exibindo 1 - 3 de 3
- Targeting the reconsolidation of traumatic memories with a brief 2-session imaginal exposure intervention in post-traumatic stress disorder(2020) VERMES, Joana Singer; AYRES, Ricardo; GOES, Adara Saito; REAL, Natalia Del; ARAUJO, Alvaro Cabral; SCHILLER, Daniela; LOTUFO NETO, Francisco; CORCHS, FelipeBackground: Evidence suggests that extinction during memory reconsolidation diminishes the return of defensive responses. In order to translate these effects to the clinical setting, we tested whether retrieving a traumatic memory and delivering a brief two-sessions imaginal exposure intervention during its reconsolidation would produce stronger decreases in reactivity to these memories than standard imaginal exposure method. Methods: Participants with Post-Traumatic Stress Disorder (PTSD) had either their traumatic (n = 21) or a neutral (n = 21) memory retrieved 1 h before an imaginal exposure session for two consecutive days. One day before and one day after, participants were exposed to script-driven imagery of their traumatic event, during which skin conductance responses were measured and, immediately after, subjective responses were assessed by means of Visual Analogue Scales. Results: Traumatic retrieval improved the physiological, but not the subjective effects of imaginal exposure intervention on over-reactivity to traumatic memories. Conclusions: Our results suggest that delivering extinction-based treatments over the reconsolidation of traumatic memories may enhance its effects. These results suggest that this is a promising path toward the development of new therapeutic techniques.
- Threat-related disorders as persistent motivational states of defense(2019) CORCHS, Felipe; SCHILLER, DanielaDefensive motivation, broadly defined as the orchestrated optimization of defensive functions, encapsulates core components of threat-related psychopathology. The exact relationship between defensive functions and stress-induced symptoms, however, is not entirely clear. Here we review how some of the most important behavioral and neurological findings related to threat-related disorders - lowering response threshold to threats, facilitated learning and generalization to new threatening cues, reduced appetitive sensitivity, and resistance to extinction of the defensive state - map onto defensive motivational states, highlighting evidence that supports conjecturing threat-related disorders as persistent motivational states. We propose a mechanism for the perpetuation of the motivational state, progressively converting temporary defensive functions into persistent defensive states associated with distress and impairment.
- Traumatic memory retrieval followed by electroconvulsive therapy as a treatment for posttraumatic stress disorder: A pilot study(2023) ARAUJO, Alvaro Cabral; CARUI, Nickolas; GUIRADO, Alia Garrudo; SCHILLER, Daniela; NETO, Francisco Lotufo; CORCHS, FelipeDelivering electroconvulsive therapy (ECT) during the reconsolidation of traumatic memories may enhance the treatment efficacy in posttraumatic stress disorder (PTSD). To test this, 14 patients with severe and refractory PTSD were randomly allocated to receive ECT sessions either after retrieving the traumatic (n=8) or a neutral (n=6) memory. We found that delivering ECT after retrieving the traumatic memory enhanced the improvement of PTSD symptoms and the reduction of subjective reactivity to the traumatic memory. Reduction in anxiety and mood symptoms and physiological reactivity to the traumatic memory were observed in the sample as a whole regardless of memory retrieval.