Chapter 49: Nervous Systems. Miranda Darling. Overview: Command and Control Center. Brain is more complex than supercomputer New technologies allow us to map brain activity in action. Concept 49.1: Nervous systems consist of circuits of neurons and supporting cells.
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Brain is more complex than supercomputer
New technologies allow us to map brain activity in action
Nervous systems relay information within the body
Nervous system evolved billions of years ago when ability to detect and react to environment in prokaryotes aided enhanced survival
During embryonic development too many neurons are present and they undergo apoptosis to form specialized regions and the brain goes from smooth to convoluted
Gray matter is layered over white matter. White matter is myelinated. Gray matter is not
Each region regulates specific functions although there is overlap among different regions and information gets integrated.
The cerebral cortex is the highly convoluted outer layer of the brain that is involved in higher thinking such as creativity, memory, and learning
Changes in synapses such as gain or loss or change in signal strength cause changes in memory and learning.
Short term memory is formed in hippocampus
Long term memory is formed in cerebrum
Disorders such as Alzheimer’s, Schizophrenia, and Bipolar disorders can be explained on the molecular level and usually have to do with faulty neurotransmitters
Stem cells present in adult brain offer treatment options through induction of differentiation of transplantation of cultured stem cells