The long term goal of the proposed research is to develop, validate and disseminate a set of generalizable methods for non-invasive mapping of the spatio-temporal dynamics of functional and structural plastic changes in the primate CNS using MRI. It outlines a strategy for improving MRI methods for measuring CNS plasticity, together with tools that allow the high resolution MRI observations to link changes in local and cellular electrophysiological properties on the one hand, to plastic changes in distributed brain circuits on the other, providing a methodological bridge across scales. The specific tools include optimized, translational, MR approaches for multiscale structural and functional brain imaging and high precision (sub-millimeter) methods for MRI and multi-modality intra- and inter-subject co-registration. The methods will be developed and tested using a well-characterized non-human primate model, and will be validated using """"""""gold standard"""""""" highresolution mapping tools including functional optical imaging of intrinsic signal (OIS), dense array electrode mapping, and tissue histology. With these goals in mind, the proposal's Specific Aims are:
Aim 1) To refine and test the limits of MRI for mapping and characterizing functional and structural plasticity with sub-millimeter resolution in intact animals.
Aim 2) To develop integrated imaging and post-processing tools that allow high precision coregistration of MR images in the same animal longitudinally and across multiple modalities.
The overarching goal of this proposal is to develop, validate and disseminate a set of generalizable methods for non-invasive mapping of the spatio-temporal dynamics of functional and structural plastic changes in the primate CNS using MRI. It outlines a strategy for enhancing existing and developing new MRI methods for measuring CNS plasticity, together with tools that allow the MRI observations in animals models to be linked back to molecular and cellular events on the one hand, and to plastic changes in the human CNS on the other, providing a methodological bridge across scales and species.
|Qi, Hui-Xin; Wang, Feng; Liao, Chia-Chi et al. (2016) Spatiotemporal trajectories of reactivation of somatosensory cortex by direct and secondary pathways after dorsal column lesions in squirrel monkeys. Neuroimage 142:431-453|
|Majeed, Waqas; Avison, Malcolm J (2014) Robust data driven model order estimation for independent component analysis of FMRI data with low contrast to noise. PLoS One 9:e94943|
|Gao, Yurui; Choe, Ann S; Stepniewska, Iwona et al. (2013) Validation of DTI tractography-based measures of primary motor area connectivity in the squirrel monkey brain. PLoS One 8:e75065|
|Lecoeur, Jérémy; Wang, Feng; Chen, Li Min et al. (2011) Co-registration of high resolution MRI scans with partial brain coverage in non-human primates. Proc SPIE Int Soc Opt Eng 7962:|
|Choe, Ann S; Gao, Yurui; Li, Xia et al. (2011) Accuracy of image registration between MRI and light microscopy in the ex vivo brain. Magn Reson Imaging 29:683-92|
|Lecoeur, Jérémy; Wang, Feng; Chen, Li Min et al. (2011) Automated longitudinal registration of high resolution structural MRI brain sub-volumes in non-human primates. J Neurosci Methods 202:99-108|
|Zhang, N; Wang, F; Turner, G H et al. (2010) Intra- and inter-subject variability of high field fMRI digit maps in somatosensory area 3b of new world monkeys. Neuroscience 165:252-64|