The Self and the Brain

Question 1

In the brain, what are the bulges of folds on the cortical surface called?

Answer 1

gyri

Question 2

What are the two roles of the callosal connections?

Answer 2

• cooperation

- competition

Question 3

The corpus callosum carries 2 types of connections between neutrons in the brain. What are they?

Answer 3

• Homotopic connections

- Heterotopic connections

Question 4

Homotopic connections?

Answer 4

between spatially analogous locations across the hemispheres

Question 5

Heterotopic connections?

Answer 5

connect cells from one area of one hemisphere to another area of the other hemisphere

Question 6

Ipsilateral connections?

Answer 6

between neurons that link within the same hemisphere

Question 7

What is the procedure for the Wada test?

Answer 7

• an angiogram is done to ensure no blockages in blood flow
• sodium amytal is applied to one hemisphere to put it to sleep
• doctors try to establish which aspects of speech, language and control are intact
• they can show a set of pictures and works to recognise and remember
• after it wears off, the doctors can test for the patients level of recall

Question 7

What is a callosotomy?

Answer 7

Cutting the corpus callosum

Question 7

Why is a collosotomy done ?

Answer 7

To stop massive seizures in epileptic patients

Question 7

What is the hemifield experiment on split brain patients?

Answer 7

• What is presented to the left hemisphere (right eye) can be reported verbally
• What is presented to the right hemisphere can be shown and touched with the left hand

Question 7

What is the block design task?

Answer 7

•the patient has to copy the spatial pattern
•when doing this with the left hand (right hemisphere) there is
No problem
•when doing it with the right hand (left hemisphere) the task is impossible
•shows that the right hemisphere is for the spatial information-processing capabilities