early brain experiments- L2

Question 1

ablation

Answer 1

involves disabling, destroying or removing selected brain tissue, followed by an assessment of subsequent changes in behaviour
-invasive
-lesioning parts of the brain - irreversible brain damage

Question 2

Pierre Flourens

Answer 2

introduced brain ablation experiments
developed techniques of damaging or removing small areas of the brain tissue to observe effects on behavior

Question 3

Karl Lashley

Answer 3

used brain ablation on rats monkeys and chimpanzees to find the location of learning and memory in the brain

Question 4

mass action (karl lashley)

Answer 4

large areas of the brain function as a whole for complex functions (if part of brain is destroyed, loss of function will depend on amount of destroyed cortex)

Question 5

equipotentiality (karl lashley)

Answer 5

healthy part of the cortex can take over the function of an injured part (plasticity)

Question 6

Moniz

Answer 6

• developed lobotomies = scraping away (via the eye) most of the connections in the prefrontal cortex

-reduction in cognitive processes and behavior
-lack of emotional expression
-reduction in interest and energy
-personalities = dull and lifeless

Question 7

electrical stimulation of the brain

Answer 7

electrodes are placed on or inside a specific place of a person’s head.

these electrodes send an electrical signal to the specific part of the brain

thereby stimulating the activity of neurons in that area

Question 8

split brain results

Answer 8

the left hemisphere is responsible for the organisation of language expression and comprehension, when words/ images are not processed in this hemisphere, they cannot be verbally stated