PSYC1002 Lecture Notes - Lecture 9: Electroencephalography, Magnetoencephalography, Electromagnetic Interference
19 May 2018
School
Department
Course
Professor
Mapping functional organisation of the brain
Effects of brain lesions
Effects of experimental brain lesions in animals
TMS - transcranial
magnetic stimulation
Uses brief magnetic pulse next to skull to induce a small electrical
current in underlying brain
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Depolarises neurons and provokes action potentials
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(like in sona study)
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Screen clipping taken: 4/11/2017 1:15 PM
Single-cell recording,
electrical stimulation,
microinjection of drugs
Microinjection into specific region of the brain
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Screen clipping taken: 4/11/2017 1:15 PM
EEG, PET, fMRI,
MEG
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Imaging
Measures which brain areas become active when
Correlations between brain activity and psychological function
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Doesn't prove causal link
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Electrode plates on skull can record electrical fields
generated by combined electrical activity of many neurons
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Has good temporal resolution (can show when activity
changes on very fine time scales)
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Poor spatial resolution (not good for seeing where activity
occurred)
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Electroencephalography
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L4 - how we study the brain
Saturday, 4 November 2017
1:10 PM
Neuroscience Page 1
Document Summary
Uses brief magnetic pulse next to skull to induce a small electrical current in underlying brain. Depolarises neurons and provokes action potentials (like in sona study) Electrode plates on skull can record electrical fields generated by combined electrical activity of many neurons. Has good temporal resolution (can show when activity changes on very fine time scales) Poor spatial resolution (not good for seeing where activity occurred) Measures activity in brain by changes in blood flow. Pet scanner records amount of o2 in each area of brain. Active area is highlighted as it draws more blood, more o2 received (needs more energy) Quite good spatial resolution, not as good temporal resolution. Bombarding head with high frequency radio waves while inside strong magnetic field. Identifies different types of brain tissue, allows visualisation. Identifies different types of brain tissue, allows visualisation of brain structures. Measures changes in o2 in blood (differences in magnetic propeties of o2-rich and o2- depleted blood) bold response.
