Brain function and imaging techniques

Question 1

Brain ablation

Answer 1

The surigical removal of brain tissue in animals by disabling, destroying or removing selected brain tissue (Also known as lesioning). Linked to localized function.

Question 2

Computerised tomography (or CAT scans)

Answer 2

A structural imaging technique that utilises x-rays to scan the brain from different angles. CT scans can find both the location and the size of a tumour and or brain injuries. Patient is given a contrast to highlight the blood vessels.

Question 3

Electrical Stimulation of the Brian (ESB)

Answer 3

Determines brain specialisation. Using electrodes - electrified fine wire - that are inserted onto the head to provide electrical stimulation.

Question 4

Magnetic Resonance Imaging (MRI)

Answer 4

Uses magnetic fields to vibrate atoms in the brain’s neurons to generate a computer image of the brain. Provides a colour image, but, the patient must lie still.

Question 5

Positron emission tomography (PET) scans

Answer 5

Produces colour images that represent brain activity and function - ‘the working brain’. Uses a glucose solution containing a short–lived radioactive tracer.

Question 6

Functional Magnetic resonance imaging (fMRI)

Answer 6

Records brain activity by measuring oxygen consumption across the brain. Can take numerous pictures of the brain. (track brain activity from moment to moment). More detailed and precise but less accurate.

Question 7

Structural Neuroimaging

Answer 7

Detects the structure of the brain to spot brain injury.

Question 8

Functional Neuroimaging

Answer 8

Detects the structure as well as brain activity.

Question 9

Autonomic nervous system