Perturbational methods

Question 1

Perturbational methods

Answer 1

Change workings of the brain, making causal relation between changes in brain and behaviour possible

Question 2

Types that fall under perturbation

Answer 2

Brain lesions
Pharmacological
Brain stimulation

Question 3

Brain lesions

Answer 3

Damage to the brain as a result of eg stroke, or case like gage

+ Gives lot of insight

• Single case studies
• Not under control of experimenter (not focal)
• Difficult to generalize, no two are the same and can be caused by many areas.

Question 4

Pharmalogical

Answer 4

Seeing how drugs interfere with brain (addicts or experimentally controlled)

Question 5

Agonist and antagonist

Answer 5

Bromoaptine eg is an agonist, does the same as real dopamine. Antagonist binds to receptor but blocks it.

• Very unspecific, effects whole brain

Question 6

Brain stimulation intracranial

Answer 6

Electrical stimulation by implanting electrode in eg subthalamic nucleus, or eg optogenetics where light gated ion channels are implanted.

Question 7

Brain stimulation extracranial

Answer 7

TMS: Magnetic field causing neural activity. Can be single pulse or repetitive (longer). Temp resolution is high but spatial very low

TES: aka tDCS, small current placed directly onto scalp. NOT neural