PSYCH 3H03 Lecture Notes - Lecture 2: Cerebral Circulation, Radioactive Tracer, Positron

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Lecture 2- neuroimaging methods and theories of emotion and expression. Overview of neuroimaging techniques: functional imaging (brain activity) Brain based- single cell recording (awake animals), intra-operative corticol stimulation mapping (himans) Indirect- measurements of neural activity metabolic methods- look at things regarding blood flow, secondary to activation. Magnetic-field-based, anatomical mri (amri), do not measure neural activity. Spatial ad temporal resolution: spatial resolution- the ability to distinguish two points in space. If you have good resolution you can see very small distances: temporal resolution- the ability to distinguish two events in time. Good= ms, poor= days: there is a general trade-off among neuroimaging techniques: Metabolic methods electrophysiological methods give good temporal resolution (msec) but poor spatial resolution (cm) (when) Metabolic methods give good spatial resolution (mm) but poor temporal resolution (cid:523)sec"s to (cid:883)(cid:882)"s of sec"s(cid:524) (where) Imaging an provide both structural and functional information about the brain. Imaging also has limitations in its spatial and temporal resolving power.

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