PSYCH 454 Study Guide - Midterm Guide: Diffusion Mri, Insular Cortex, Clustering Coefficient
4 Mar 2018
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Clustering coefficient : number of connections that exist between nearest neighbors of a node (as a proportion of maximum # of connections) Node degree: number of connections that link a node to the rest of the network. Modules : highly clustered neurons, subset of nodes with high within-module connectivity and low intermodule (between other modules) connectivity. Connector hub : high degree of connections that connects to other modules. Provincial hub : high degree of connections but connecting within the same module, doesn"t connect with other. Anatomical connections: axons project from one neuron to another. Parallel projections of axons for white matter paths. Measure via tracer studies (invasive) or diffusion mri (non-invasive) Diffusion mri: exploit fact water will travel more readily along connection rather than across connection. Functional connections : correlated neural activity between different brain areas. Can show correlation between two connected areas.
