The goal of P3 is to explore methods for identifying OCD-relevant circuitry in individuals. As targets for invasive and non-invasive OCD treatments become available, a bottleneck for translation in clinical practice is the ability to robustly identify affected circuits in individual patients and measure network modulation. More broadly, focus on groups in neuroimaging studies has slowed translation of findings to the clinical arena where the focus is on the individual. If successful, the project will provide a general set of methods for identifying within-individual network measures that can guide interventions and serve as tailored biomarkers for clinical readouts. The central hypothesis of our Center is that OCD is characterized by hyperconnectivity between the amyg/vmPFC and dACC/ OFC and decreased connectivity between dlPFC/vlPFC and dACC/OFC. This change in balance between emotional processing and cognitive control systems results in a pathological heightened activity state in the dACC/OFC/vlPFC/DS circuitry. In this project we will explore core nodes of this circuitry within individuals and use these methods to explore neuromodulatory effects of OCD circuitry.
Aim 1. Identify OCD- relevant circuitry in healthy individuals from the available data including the spatial variability in node location. We hypothesize that, while clustering around the group central tendency, the location of key nodes including the dACC and vlPFC will spatially shift across individuals. These measures will be used to build a variability map.
Aim 2. Develop and validate an HCP-inspired connectomic acquisition and analysis strategy targeting diffusion and functional connectivity on a widely available MRI platform.
Aim 3. Examine changes in OCD circuitry before and after neuromodulation, 3A. OCD circuitry will be measured in 12 individuals before and after cingulotomy. We hypothesize that coupling between DS and regions just rostral to the cingulotomy will be reduced in effective treatment and preserved in ineffective treatment. 3B. A within-subject TMS study motivated by P4 will analyze before vs after TMS stimulation to further explore whether connectivity measures can be used as a readout of circuit-level perturbations in the individual.
|Do-Monte, Fabricio H; Minier-Toribio, Angélica; Quiñones-Laracuente, Kelvin et al. (2017) Thalamic Regulation of Sucrose Seeking during Unexpected Reward Omission. Neuron 94:388-400.e4|
|Tang, Wei; Liu, Hesheng; Douw, Linda et al. (2017) Dynamic connectivity modulates local activity in the core regions of the default-mode network. Proc Natl Acad Sci U S A 114:9713-9718|
|Braga, Rodrigo M; Buckner, Randy L (2017) Parallel Interdigitated Distributed Networks within the Individual Estimated by Intrinsic Functional Connectivity. Neuron 95:457-471.e5|
|Van't Wout, Mascha; Longo, Sharon M; Reddy, Madhavi K et al. (2017) Transcranial direct current stimulation may modulate extinction memory in posttraumatic stress disorder. Brain Behav 7:e00681|
|Choi, Eun Young; Tanimura, Yoko; Vage, Priti R et al. (2017) Convergence of prefrontal and parietal anatomical projections in a connectional hub in the striatum. Neuroimage 146:821-832|
|Nenning, Karl-Heinz; Liu, Hesheng; Ghosh, Satrajit S et al. (2017) Diffeomorphic functional brain surface alignment: Functional demons. Neuroimage 156:456-465|
|Coizet, Veronique; Heilbronner, Sarah R; Carcenac, Carole et al. (2017) Organization of the Anterior Limb of the Internal Capsule in the Rat. J Neurosci 37:2539-2554|
|Wise, T; Radua, J; Via, E et al. (2017) Common and distinct patterns of grey-matter volume alteration in major depression and bipolar disorder: evidence from voxel-based meta-analysis. Mol Psychiatry 22:1455-1463|
|Rodriguez-Romaguera, Jose; Greenberg, Benjamin D; Rasmussen, Steven A et al. (2016) An Avoidance-Based Rodent Model of Exposure With Response Prevention Therapy for Obsessive-Compulsive Disorder. Biol Psychiatry 80:534-40|
|Martínez-Rivera, Freddyson J; Rodriguez-Romaguera, Jose; Lloret-Torres, Mario E et al. (2016) Bidirectional Modulation of Extinction of Drug Seeking by Deep Brain Stimulation of the Ventral Striatum. Biol Psychiatry 80:682-690|
Showing the most recent 10 out of 18 publications