M.Sc. Cognitive Neuroscience

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Neurocognitive Methods

Question 1:

What does TMS stand for?

Transcranial Magnetic Stimulation is a technique which uses changing magnetic fields to induce a current in the brain and thereby disrupt ongoing electric activity. 

Question 2:

Which of the following techniques are invasive? Click all those that apply.

Single cell recordings involve inserting an electrode into the brain and directly recording from a small number of neurons, however the name is a misnomer in that one is not recording from a single neuron but a population. 

Positron Emission Tomography requires the subject to be injected with positrons, a form of anti-matter. 

Both functional Magnetic Resonance Imaging and Electroencephalography are non-invasive in that they don't require any substances to be injected or inserted into the body. 

Question 3:

Which of the following options is false about EEG?

Question 4:

What does fMRI (functional magnetic resonance imaging) measure? Click all those that apply.

fMRI measures the BOLD or Blood Oxygenated-Level Dependent signal. When neurons are active they require blood to bring them glucose and other necessary substances and the changing ratio of deoxygenated:oxygenated blood can be measured due to the different susceptibility of the deoxygenated vs. oxygenated blood to the magentic field. 

Please click on the for feedback to each answer.