The Tangled Wing Chapter Four The Fabric of Meaning Alison et Claire
Overview When the brain starts to grow, billions of neurons must be born 100,000 a minute by the division of parent cells Within the neurons Dendrites receive Axons transmit
Brain Development Is not random, yet it is impossible to predict Tiny diﬀerences at the start are ampliﬁed with time. Chaos in the formal sense It is fast, orderly, amazingly complex, and miraculous
Brain Development During development, spines along the dendrites form Can be changed either by genes or by experience Brain development is a combination of both
Genes In early stages, genes determine most of the brains development Shape forms Genes give the brain a predetermined structure and design based on the genetic material from parents. Tay-‐Sachs Disease is an example of how important genes are for brain development.
Experience/Environment Environmental enrichment How the Brain is aﬀected by stimulations
Theories Purves Changeux Edelman Goodwin and Kauﬀman
Conclusion No simple construct will explain how the dissimilar tasks of brain development are shared between genes and environment. However, in any analysis of human nature, neither can be ignored.