6Neuro08-1

6Neuro08-1 - Introduction to the Nervous System Overview...

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Introduction to the Nervous System
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Overview Today: A. Gross Structure of the Nervous System Central vs Peripheral nervous system B. Central Nervous System Part I: Brainstem and subcortical structures C. Central Nervous System Part II: Cortex 1. Parceling up the brain 2. The Integrated Brain Tuesday: Fine Structure of the Nervous System (Neurons and how they communicate)
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Central and Peripheral Nervous Systems The Central Nervous System is comprised of the brain and the spinal cord (shown in red) The Peripheral Nervous System is the set of nerves that connects the CNS to the sensory organs, muscles and glands (shown in blue)
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Nervous system Peripheral
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Central Nervous system Autonomic (controls self-regulated action of internal organs and glands i ) Sympathetic (arousing ( ) Parasympathetic (calming ( ) Peripheral
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Which system is active?
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See Bill Gates…
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Which system is active?
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The sympathetic division is important for the response to stressful situations. This system can increase heart rate and blood pressure, release energy products like sugar and fat into the system when vigorous activity is called for, reduce digestive activity (ironic in the case of a pie in the face), increase blood flow to skeletal muscles so that they will work more effectively. The parasympathetic division has the opposite effects from the sympathetic division. It stimulate digestive processes, and other activities that help to regenerate and vitalize the body. Two Divisions of the Autonomic Nervous System
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In the course of evolution, species have developed more complex brain systems by “adding on” to older, more primitive structures. In humans, the brainstem is the simplest and oldest of the brain structures. It performs many of the same functions as it did for our ancestors. The cerebral cortex is the more recent and the
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6Neuro08-1 - Introduction to the Nervous System Overview...

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