8th grade ch. 6 sec. 2 divisions of the nervous system
TRANSCRIPT
Sec. 2Divisions of the Nervous System
nervous system
central nervoussystem
peripheral nervous system
central nervous system
• control center of body
• incl:1.brain2.spinal cord
Brain &
Spinal Cord
central nervous system
brain
• contains about 100 billion neurons
3 mainregions of brain
cerebrum cerebellum brain stem
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
cerebrum
cerebellum• muscular coordination
• balance
brainstem
• controls involuntary actions
–breathing, heartbeat
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
reflex• automatic response that occurs
very rapidly & without conscious control
nervous system injuries
1. concussion= bruiselike injury of brain
2. spinal cord injury= spinal cord is cut or crushed
Ouch !!!!!
It may be a concussion????
Spinal cord injury
Christopher Reeve as Superman
Christopher Reeve
The Man of Steel
Christopher Reeve
Spinal cord injury
Quadripalegic
