Cognition 2

Funconal magnec resonance imaging fmri psych213 winter

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Unformatted text preview: ethods of Cogni:ve Neurosci (4) Func:onal neuroimaging (b) Positron Emission Tomography (PET) Structural (provided by CT or MRI) Primarily metabolic measure of glucose reuptake.  Brain ac:vity= glucose metabolism Radioac:ve tracer that binds with glucose molecules is picked up by the scanner. Tracer reuptake takes :me, so temporal resolu:on is bad Psych213 Winter 2012, Prof Ris:c Slide Number 29 Methods of Cogni:ve Neurosci (4) Func:onal neuroimaging (c) Magne-c Resonance Imaging (MRI) func:onal Magne:c Resonance Imaging (fMRI) Metabolic changes in oxygenated/deoxygenated blood BOLD ­Blood Oxygena:on Level Dependant Excellent spa:al resolu:on < 1mm Bad temporal resolu:on >1s Psych213 Winter 2012, Prof Ris:c Slide Number 30 Methods of Cogni:ve Neurosci (4) Func:onal neuroimaging (c) Magne-c Resonance Imaging (MRI) func:onal Magne:c Resonance Imaging (fMRI) Psych213 Winter 2012, Prof Ris:c Slide Number 31 Methods of Cogni:ve Neurosci (4) Func:onal neuroimaging (d) Electroencephalography (EEG) Brain’s electrical ac:vity at scalp Excellent temporal resolu:on –real :me Bad spa:al resolu:on ~10mm ERP—Event Related Poten:als EEG ac:vity :me locked to a specific event, e.g., red dot Psych213 Winter 2012, Prof Ris:c Slide Number 32 Methods of Cogni:ve Neurosci ERP—Event Related Poten:als EEG ac:vity :me locked to a specific event, e.g., red dot P1 ­ Sensory processing N1 ­Feature extrac:on (red) P2 ­Discrimina:on (circle vs. square) N2 ­Recogni:on P3 ­Decision (press a key for red dot) Psych213 Winter 2012, Prof Ris:c Slide Number 33 Methods of Cogni:ve Neurosci (4) Func:onal neuroimaging (e) Magnetoencephalography (MEG) Brain’s electrical ac:vity (but picks up magne:c fields ) Excellent temporal resolu:on –real :me Somewhat beFer spa:al resolu:on Psych213 Winter 2012, Prof Ris:c Slide Number 34 Methods of Cogni:ve Neurosci (4) Func:onal neuroimaging (f) Transcranial Magne-c S-mula-on (TMS) Reversible human lesions Transient disrup:on of human brain...
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This note was uploaded on 04/14/2013 for the course PSYC 213 taught by Professor Levitin during the Winter '08 term at McGill.

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