2.1. Dwayne Johnson. CC BY-NC 4.0 Printerval.
2.2. Neurons. Author.
2.3. Undulating Line. Author.
2.4. Brain Gyrification. Author.
2.5. Muscular Arm. Artisteer via iStockPhoto.
2.6. Alzheimer’s brain. Author.
2.7. Iris Murdoch. Public Domain.
2.8. Cortical gray matter. Author.
2.9. Graham Phillips. Used with permission of Graham Phillips.
2.10. Elder chess. Pixabay.
2.11. Prosocial emotions. iStockPhoto.
2.12. Sea horse. Pixabay.
2.13. Dentate Gyrus. Used with permission of Noguchi et al., (2016).
2.14. Albert Einstein. Public Domain.
2.15. Stress reduces neural connections. Author.
2.16. Rollerblading. Pixabay.
2.17. Anxiety and cognition seesaw. Author.
2.18. Mother and daughter meditating. Pixabay.
2.19. Mingyur Rinpoche. CC BY-SA 4.0 Youngerson via Wikimedia Commons.