Biol 216 6 Brain & Nervous System 1-32.pdf

Biol 216 6 Brain & Nervous System 1-32.pdf - Power...

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5/19/17 1 Power point 6: The Brain & Nervous System Learning Goals 1. Providean overview of the key aspects of neural development 2. Identify major brain regions and describe their functions 3. Describe the function and interplay of the divisionsof the nervoussystem. 4. Understand the molecular basis of memory
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5/19/17 2 Evolutionof the NervousSystem As animals evolved, therebecame a greater need for an increasingly complex and adept nervous system… To compete Escape danger/predators Find food, shelter, mates Strong natural selection pressure for a more refined, competent nervous system Comparative Neuroscience Invertebrates: Simple nervous system Fewer neurons Less complex networks Then: cephalization The development of an anterior head where sensory organs and nervous tissues are concentrated
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5/19/17 3 Evolution of Nervous Systems Nerve nets :loose mesh of neuronsfound in radially symmetrical animals Nerve cord : bundleof nerves which extend fromthe central ganglia to the rest of the body Trend toward bilateral symmetry of nervoussystem and body Ganglia: functional clusters of neurons Phyla
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5/19/17 4 Bilateral Symmetry Body parts are mirror images on the either side of the midline Organization of the nervous system, such as paired nerves linking lobes in brain with specific muscles and receptors, allows for sophisticated sensory processing.
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  • Spring '14
  • BarbaraKuemerle

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