Notes: Topic 2 (chpt.7) pt.3

Question 1

What is single-cell recording?

Answer 1

A very small wire gets inserted to the brain, and instead of applying electricity, it receives it and measures the electrical current

Question 2

What is an Electroencephalogram (EEG)

Answer 2

A tool where electrodes measure “summed graded potentials” of all neurons in an area.

Question 3

What are Event-Related Potentials (ERP)

Answer 3

looking at patterns in the graded potentials on dendrites triggered by a sensory stimuli

Question 4

What are Temporal and Spatial Resolutions

Answer 4

Temporal Resolutions: describes its ability to tell you exactly WHEN the activation happened
Spatial Resolutions: the capacity a technique has to tell you exactly which area of the brain is active

Question 5

Event-Related Potentials (ERP’s) process needs to be done over and over again and averaged across multiple stimulus presentations, why do we have to do this?

Answer 5

Because other stimuli (like background noise from a fan) can interfere with results

Question 6

What is a Magnetoencephalography (MEG)

Answer 6

Instead of measuring electricity, the MEG measures the magnetic fields produced by the passage of electric electricity of the skull, that allows 3D visualization

Question 7

What is a pro and con on the MEG

Answer 7

Pro: has a higher resolution than a ERP
Con: expensive

Question 8

What are Anatomical Imaging Techniques

Answer 8

imaging techniques that focus on the “structures” of the brain

Question 9

What is a Computed tomography (CT) scan

Answer 9

A scan that produces flat static images using x-rays and dye.

Question 10

What is a Magnetic Resonance Imaging (MRI) scan

Answer 10

a scan that produces static 3D images by passing a strong magnetic field through the brain.

Question 11

Why are MRI’s preferred over a CT scan

Answer 11

Because its more accurate and has a higher spacial resolution