3.4 Measuring and observing brain activity

Question 1

Lesioning

Answer 1

a technique in which researchers intentionally damage an area in the brain

Question 2

Sham group

Answer 2

a set of animals that go through all of the surgical procedures aside from the lesion itself in order to control for the effects of stress, anesthesia, and the annoyance of stitches

Question 3

Transcranial magnetic stimulation

Answer 3

a procedure in which an electromagnetic pulse is delivered to a targeted region of the brain (disruption of activity)

Question 4

Structural neuroimaging

Answer 4

a type of brain scanning that produces images of the diff structures of the brain

Question 5

CT scan

Answer 5

x-rays are sent through the brain by a tube that rotates around the head (SNI)

Question 6

MRI

Answer 6

clear images of the brain are created based on how diff neural regions absorb and release energy while in a magnetic field (SNI)

Question 7

Diffusion tensor imaging - DTI

Answer 7

measure white matter pathways (SNI)

Question 8

Functional neuroimaging

Answer 8

a type of brain scanning that provides information about which areas of the brain are active when a person performs a particular behaviour

Question 9

EEG - Electroencephalogram

Answer 9

measures patterns of brain activity with the use of multiple electrodes attached to the scalp (peaks + valleys) no WHERE

Question 10

MEG - Magnetoencephalography

Answer 10

measures the tiny magnetic fields created by the electrical activity of nerve cells in the brain (isolate location)

Question 11

PET

Answer 11

a low level of radioactive isotope is injected into the blood, and its movement to regions of the brain engaged in a particular task is measured - WHERE

Question 12

fMRI - functional

Answer 12

measures brain activity by detecting the influx of oxygen-rich blood into neural areas that were just active- accurate, WHERE