Dendrites: The branched fibers of neurons that receive signals from other neurons. One of the parts of the physical brain known to respond to emotional stimulus, such as touch, by growing and expanding over time.
Neuroethologist: A psychologist who specializes in applying the methodologies of brain science to the study of animal behavior.
Psychosocial Dwarfism: A syndrome in which children's normal development is inhibited by traumatic psychological surroundings or events. For instance, physical growth may be stunted when young children experience stress due to family trauma, abandonment, or lack of human touch. Also known as stress dwarfism.
Survival of the Fittest: A key concept in the theory of evolution, survival of the fittest can be understood as the idea that those organisms best adapted to their environment will be more successful than those who are not. Although a concept from biology, survival of the fittest, and natural selection began to be used in other spheres as early as 1900.