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Lecture notes The Attentive Brain
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Lecture notes for The Attentive Brain in BSc Psychology degree
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L5- The attentive brainWhy neuroscience methods?
Brain anatomy/function can inform about the cognitive processes it implements
cognitive architecture
Measures of brain activity provide complementary dependent measures
Functional brain measures can inform on location + time course of cogntion
Brain electrophysiology
Event-Related Potentials (ERP)
Derived from electroencephalogram (EEG)= averaged + time-locked to a stimulus event
Direct measure
High temporal resolution
- Time course (when)
Low spatial resolution
- Localisation (where)
Event-related brain potentials
Functional imaging: fMRI
fMRI= functional magnetic resonance imaging
positive correlation between neural activity + blood flow
regional cerebral blood flow indirect
High spatial/poor temporal resolution
Probing the locus of selection
Does attention affect neural activity in response to stimuli?
, At what point during processing?
ERP- effects on early components
fMRI- effects on early visual areas
Luck (1995)
Covert orienting of attention is reflected in early event-related potential components
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