Development of the brain is influenced by nature and nurture. Give two examples of how nurture can impact brain development in either a positive or adverse way. In addition, what is meant by the term, critical period as it refers to development? Discuss how the concept of critical periods applies to various aspects of physical, brain, and perceptual development. In terms of brain development, how have research findings on neuroplasticity changed our views about the rigidity imposed by critical periods? Finally, while neuroplasticity is impacted by nature, what role can nurture play in neuroplasticity as well?