NA-MIC Internal Collaborations:fMRIAnalysis

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fMRI Analysis

Functional Activation Analysis

	fMRI clustering In this project we study the application of model-based clustering algorithms in identification of functional connectivity in the brain. More... New: 1) D. Lashkari and P. Golland, Exploratory fMRI Analysis without Spatial Normalization. Accepted to IPMI: International Conference on Information Processing and Medical Imaging, 2009. 2) A. Venkataraman, K.R.A. Van Dijk, R.L. Buckner, P. Golland. Exploring Functional Connectivity in fMRI via Clustering. Accepted to ICASSP: IEEE International Conference on Acoustics, Speech and Signal Processing,2009.
	Neural Substrates of Apathy We recently observed reduced volume of the frontal lobe in patients with schizophrenia having high levels of apathy (link to journal below). In the present investigation we are extending our study of the structural correlates of apathy in schizophrenia using the NAMIC toolkit with an emphasis on basal ganglia. More...
	Neural Substrates of Working Memory in Schizophrenia This project assesses working memory using an auditory verbal version of the n-back task paradigm. Three conditions are presented in blocks in counterbalanced order with increasing working memory load demands (0-, 1-, 2- and 3-back). More...
	fMRI Detection and Analysis We are exploring algorithms for improved fMRI detection and interpretation by incorporting spatial priors and anatomical information to guide the detection. More...
	Brain Activation during Continuous Verbal Encoding and Recognition Task in Schizophrenia This project employs an event-related auditory verbal episodic memory probe targeting medial temporal and DLPFC circuitry. The task uses a continuous performance format where concrete nouns are presented initially as new items. Words are then repeated after short or long intervals and the participant is required to make a new/old distinction. This design permits analysis of both encoding and recognition processes. More...
	Conformal Flattening The goal of this project is for better visualizing and computation of neural activity from fMRI brain imagery. Also, with this technique, shapes can be mapped to shperes for shape analysis, registration or other purposes. Our technique is based on conformal mappings which map genus-zero surface: in fmri case cortical or other surfaces, onto a sphere in an angle preserving manner. More...