Studies of the brain/ Neuro-imaging techniques

Question 1

Split brain surgery

Answer 1

Involves cutting the main band of the nerve tissue connecting the two hemispheres, this reduces the severity of epileptic seizures.

Question 2

CT scan def, adv + dis

Answer 2

An x-ray that produces 3D images of the brain and other structures of the body. Adv- safe, cost effective, identifies precise location of tumors. Dis- no info on function of the brain, x-rays emit radiation, images are in black and white.

Question 3

PET scan def, adv + dis

Answer 3

Measures the volume and location of blood flow in the brain by tracking glucose. Adv- shows function of brain during motor and cognitive tasks, shows disease progression (alzhiemers). Dis- expensive, radioactive substances have short time limit, low resolution image.

Question 4

MRI scan def, adv + dis

Answer 4

Uses magnetic fields and radio waves to produce a computer-enhanced image of the brain structure. Adv- 3D detailed colour images, harmless magnetic fields are used. Dis- expensive, doesn’t provide info about function of brain, cannot be used with any metals placed in body.

Question 5

fMRI scan def, adv + dis

Answer 5

Similar to MRI however also shows real time brain function by tracking blood flow and oxygen consumption. Adv- detailed info regarding brain function and structure, high resolution images. Dis- very loud and claustrophobic chamber.