Answer:
Brain staining and Brain lesioning
Explanation:
Both methods may be used together in the research. While one is physical in that it involves surgery to the brain, the other is psychological as in observes behavior or cognitive processes of a person in studying neural function. Brain staining involves staining or painting the brain to visualize clearly for instance neural connections in the brain using such techniques as nissl staining and observing these neural networks through powerful microscopes. Brain lesioning on the other hand which may be complementary to brain staining involves observing behavioural changes or cognitive processes in individuals who may have suffered injury to the brain in an accident for instance
