JOAO RICARDO SATO
Projetos de Pesquisa
Unidades Organizacionais
LIM/44 - Laboratório de Ressonância Magnética em Neurorradiologia, Hospital das Clínicas, Faculdade de Medicina
5 resultados
Resultados de Busca
Agora exibindo 1 - 5 de 5
- Distinct Subcortical Volume Alterations in Pediatric and Adult OCD: A Worldwide Meta-and Mega-Analysis (vol , pg , 2016)(2017) ABE, Yoshinari; ALONSO, Pino; AMEIS, Stephanie H.; ARNOLD, Paul D.; BARGALLO, Nuria; BATISTUZZO, Marcelo C.; BENEDETTI, Francesco; BEUCKE, Jan C.; BOEDHOE, Premika S. W.; BOLLETTINI, Irene; BOSE, Anushree; BREM, Silvia; BUSATTO, Geraldo F.; CALVO, Anna; CALVO, Rosa; CATH, Danielle C.; CHENG, Yuqi; CHO, Kang Ik K.; DALLASPEZIA, Sara; VRIES, Froukje E. de; WIT, Stella J. de; DENYS, Damiaan; FANG, Yu; FITZGERALD, Kate D.; FONTAINE, Martine; FOUCHE, Jean-Paul; GIMENEZ, Monica; GRUNER, Patricia; HANNA, Gregory L.; HIBAR, Derrek P.; HOEXTER, Marcelo Q.; HU, Hao; HUYSER, Chaim; IKARI, Keisuke; JAHANSHAD, Neda; KATHMANN, Norbert; KAUFMANN, Christian; KHADKA, Sabin; KOCH, Kathrin; KWON, Jun Soo; LAZARO, Luisa; LIU, Yanni; LOCHNER, Christine; MARSH, Rachel; MARTINEZ-ZALACAIN, Ignacio; MATAIX-COLS, David; MENCHON, Jose M.; MIGUEL, Euripedes C.; MINUZZI, Luciano; MORER, Astrid; NAKAMAE, Takashi; NAKAO, Tomohiro; NARAYANASWAMY, Janardhanan C.; PIRAS, Fabrizio; PIRAS, Federica; PITTENGER, Christopher; REDDY, Y. C. Janardhan; SATO, Joao R.; SIMPSON, H. Blair; SCHMAAL, Lianne; SORENI, Noam; SORIANO-MAS, Carles; SPALLETTA, Gianfranco; STEIN, Dan J.; STEVENS, Michael C.; SZESZKO, Philip R.; THOMPSON, Paul M.; TOLIN, David F.; VELTMAN, Dick J.; VENKATASUBRAMANIAN, Ganesan; HEUVEL, Odile A. van den; WERF, Ysbrand D. van der; WINGEN, Guido A. van; WALITZA, Susanne; WANG, Zhen; XU, Jian; XU, Xiufeng; YUN, Je-Yeon; ZHAO, Qing
- Multicenter Voxel-Based Morphometry Mega-Analysis of Structural Brain Scans in Obsessive-Compulsive Disorder(2014) WIT, Stella J. de; ALONSO, Pino; SCHWEREN, Lizanne; MATAIX-COLS, David; LOCHNER, Christine; MENCHON, Jose M.; STEIN, Dan J.; FOUCHE, Jean-Paul; SORIANO-MAS, Caries; SATO, Joao R.; HOEXTER, Marcelo Q.; DENYS, Damiaan; NAKAMAE, Takashi; NISHIDA, Seiji; KWON, Jun Soo; JANG, Joon Hwan; BUSATTO, Geraldo F.; CARDONER, Narcis; CATH, Danielle C.; FUKUI, Kenji; JUNG, Wi Hoon; KIM, Sung Nyun; MIGUEL, Euripides C.; NARUMOTO, Jin; PHILLIPS, Mary L.; PUJOL, Jesus; REMIJNSE, Peter L.; SAKAI, Yuki; SHIN, Na Young; YAMADA, Kei; VELTMAN, Dick J.; HEUVEL, Odile A. van denObjective: Results from structural neuroimaging studies of obsessive-compulsive disorder (OCD) have been only partially consistent. The authors sought to assess regional gray and white matter volume differences between large samples of OCD patients and healthy comparison subjects and their relation with demographic and clinical variables. Method: A multicenter voxel-based morphometry mega-analysis was performed on 1.5-T str.uctural T-1-weighted MRI scans derived from the International OCD Brain Imaging Consortium. Regional gray and white matter brain volumes were compared between 412 adult OCD patients and 368 healthy subjects. Results: Relative to healthy comparison subjects, OCD patients had significantly smaller volumes of frontal gray and white matter bilaterally, including the dorsomedial prefrontal cortex, the anterior cingulate cortex, and the inferior frontal gyrus extending to the anterior insula. Patients also showed greater cerebellar gray matter volume bilaterally compared with healthy subjects. Group differences in frontal gray and white matter volume were significant after correction for multiple comparisons. Additionally, group-by-age interactions were observed in the putamen, insula, and orbitofrontal cortex (indicating relative preservation of volume in patients compared with healthy subjects with increasing age) and in the temporal cortex bilaterally (indicating a relative loss of volume in patients compared. with healthy subjects with increasing age). Conclusions: These findings partially support the prevailing fronto-striatal models of OCD and offer additional insights into the neuroanatomy of the disorder that were not apparent from previous smaller studies. The group-by-age interaction effects. in orbitofrontal-striatal and (para)limbic brain regions may be the result of altered neuroplasticity associated with chronic compulsive behaviors, anxiety, or compensatory processes related to cognitive dysfunction.
conferenceObject Orbitofrontal Thickness as a Measure for Treatment Response Classification in Obsessive-Compulsive Disorder(2014) HOEXTER, Marcelo; DINIZ, Juliana; LOPES, Antonio; BATISTUZZO, Marcelo; SHAVITT, Roseli; DOUGHERTY, Darin; DURAN, Fabio; BRESSAN, Rodrigo; BUSATTO, Geraldo; MIGUEL, Euripedes; SATO, Joao- Brain activity patterns during phonological verbal fluency performance with varying levels of difficulty: A functional magnetic resonance imaging study in Portuguese-speaking healthy individuals(2011) SENHORINI, Maurien C. T.; CERQUEIRA, Carlos T.; SCHAUFELBERGER, Maristela S.; ALMEIDA, Jorge C.; AMARO, Edson; SATO, Joao R.; BARREIROS, Maria A. M.; AYRES, Adriana M.; CASTRO, Claudio C.; SCAZUFCA, Marcia; MENEZES, Paulo R.; BUSATTO, Geraldo F.A large number of functional neuroimaging studies have investigated the brain circuitry which is engaged during performance of phonological verbal fluency tasks, and the vast majority of these have been carried out in English. Although there is evidence that this paradigm varies depending on the language spoken, it is unclear if this difference is associated with differences in brain activation patterns. Also, there is neuroimaging evidence that the patterns of regional cerebral activation during verbal fluency tasks may vary with the level of task demanded. In particular, the engagement of the anterior cingulate cortex seems to be relative to cognitive demand. We compared functional magnetic resonance imaging data in healthy Portuguese-speaking subjects during overt production of words beginning with letters classified as easy or hard for word production in Portuguese. Compared to the baseline condition, the two verbal fluency tasks (with either easy or hard letters) engaged a network including the left inferior and middle frontal cortices, anterior cingulate cortex, putamen, thalamus and cerebellum (p < .001). The direct comparison between the two verbal fluency conditions showed greater cerebellar activation in the easy condition relative to the hard condition. In the anterior cingulate cortex, there was a direct correlation between activity changes and verbal fluency performance during the hard condition only. Despite grammatical differences, the changes in patterns of brain activity during verbal fluency performance observed in our study are in accordance with findings of previous neuroimaging studies of verbal fluency carried out in English and other languages, with recruitment of a set of distributed cerebral areas during word production.
- Healthy individuals treated with clomipramine: an fMRI study of brain activity during autobiographical recall of emotions(2014) CERQUEIRA, C. T.; SATO, J. R.; ALMEIDA, J. R. C. de; AMARO JR., E.; LEITE, C. C.; GORENSTEIN, C.; GENTIL, V.; BUSATTO, G. F.Various functional magnetic resonance imaging studies addressed the effects of antidepressant drugs on brain functioning in healthy subjects; however, none specifically investigated positive mood changes to antidepressant drug. Sixteen subjects with no personal or family history of psychiatric disorders were selected from an ongoing 4-week open trial of small doses of clomipramine. Follow-up interviews documented clear positive treatment effects in six subjects, with reduced irritability and tension in social interactions, improved decision making, higher self-confidence and brighter mood. These subjects were then included in a placebo-controlled confirmatory trial and were scanned immediately after 4 weeks of clomipramine use and again 4 weeks after the last dose of clomipramine. The functional magnetic resonance imaging (fMRI) scans were run during emotion-eliciting stimuli. Repeated-measures analysis of variance of brain activity patterns showed significant interactions between group and treatment status during induced irritability (P < 0.005 cluster-based) but not during happiness. Individuals displaying a positive subjective response do clomipramine had higher frontoparietal cortex activity during irritability than during happiness and neutral emotion, and higher temporo-parieto-occipital cortex activity during irritability than during happiness. We conclude that antidepressants not only induce positive mood responses but also act upon autobiographical recall of negative emotions.