8th Grade Ch. 6 Sec. 2 Divisions of the Nervous System
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Transcript of 8th Grade Ch. 6 Sec. 2 Divisions of the Nervous System
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Sec. 2Divisions of the Nervous System
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nervous system
central nervoussystem
peripheral nervous system
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central nervous system
• control center of body
• incl:1.brain2.spinal cord
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Brain &
Spinal Cord
central nervous system
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brain
• contains about 100 billion neurons
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3 mainregions of brain
cerebrum cerebellum brain stem
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cerebrum
• largest part of brain
• interprets input from senses
• controls movement of skeletal muscles
• divided into right half & left half
– right half creativity & artistic ability
– left half math skills, speech, writing, logical thinking
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cerebrum
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cerebellum• muscular coordination
• balance
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brainstem
• controls involuntary actions
–breathing, heartbeat
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peripheral nervous system
• all the nerves located outside of central nervous system
• divided into 2 groups:
1. somatic system- controls voluntary actions
2. autonomic system- controls involuntary actions
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reflex• automatic response that occurs
very rapidly & without conscious control
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nervous system injuries
1. concussion= bruiselike injury of brain
2. spinal cord injury= spinal cord is cut or crushed
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Ouch !!!!!
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It may be a concussion????
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Spinal cord injury
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Christopher Reeve as Superman
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Christopher Reeve
The Man of Steel
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Christopher Reeve
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Spinal cord injury
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Quadripalegic
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