Lecture5 - Nervous System I

Lecture5 - Nervous System I - Nervous System I Central...

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Nervous System I Central Nervous System (CNS): Brain and Spinal cord Peripheral Nervous System : Nerves to rest of body Brain: Receives sensory input from the spinal cord as well as its own nerves (e.g. olfactory and optic nerves) Devotes most of its volume and computational power to processing its various sensory inputs and initiating appropriate/coordinated motor outputs. Very complex system: 100 billion neurons, average 10,000 synapses on each neuron Consists of: Cerebral Hemispheres 85% of brain’s weight Two hemispheres covered by outer layer called cerebral cortex Left side controls right motor coordination, right controls left Controls conscious thought, language, decision making, emotions, movement and sensory functions Four lobes: Frontal: Speech, Voluntary motor control, Conscious sensations Parietal: Perception of stimuli related to touch, pressure, pain, temperature Occipital: Vision Temporal: Hearing, Memory Cerebellum
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This note was uploaded on 04/06/2008 for the course BMVS 4064 taught by Professor Dr.lee during the Spring '08 term at Virginia Tech.

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Lecture5 - Nervous System I - Nervous System I Central...

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