Lecture 30

Question 1

What is MRI used for?

Answer 1

• Magnetic resonance imaging

- Measures structure

Question 2

What is fMRI used for?

Answer 2

• Functional magnetic resonance imaging

- Measures function

Question 3

Describe MRI in terms of spatial and temporal resolution

Answer 3

They have high spatial resolution but low temporal resolution

Question 4

What is the Corpus Callosum made up of?

Answer 4

Mainly nerve fibres (axons) with some grey matter (cell bodies) embedded

Question 5

What is a Callosotomy?

Answer 5

Surgical disconnection of Corpus Callosum

Question 6

What is a Commissurotomy?

Answer 6

Surgical disconnection of Corpus Callosum and anterior/posterior commissures

Question 7

Describe the technique of visual lateralisation

Answer 7

• Used to deliver information to each hemisphere separately

- Stimulus information goes into the same cortex as the motor cortex that allows the limb to move

Question 8

What are the conditions of a visual lateralisation task?

Answer 8

• Individual must keep their eyes straight ahead to ensure image is only presented to one side
• Stimuli only presented for short duration