Divisions of the Nervous System

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Divisions of the Nervous System

• Chapter 6 Section 2
• Pages 182 - 189

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CHAPTER 6.2 Divisions of the Nervous System
Objective Describe the functions of the Central
Nervous System. Identify its parts explain
how to keep it safe from injury.
Objective Describe the functions of the
Peripheral Nervous System identify its parts.
Objective Describe Reflexes.
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• Central Nervous System Consists of the brain
• spinal cord. It is the control center of the
  body.

• Peripheral Nervous System Consists of all the
• nerves located outside of the Central Nervous
  System.

• Brain Located in the skull. Controls most
  functions
• in the body.

• Spinal Cord Thick column of nerve tissue that
  links
• the brain to most of the nerves. The link
  between the
• brain the peripheral nervous system.

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• Cerebrum Largest part- interprets input from
  the
• senses. Controls the movement of skeletal
  muscles.
• Carries out complex mental processes such as
  learning,
• Remembering making judgments.

6. Cerebellum Coordinates the actions of your
muscles and helps you keep your balance.
7. Brainstem Lies between the cerebellum
spinal cord. Controls the bodys involuntary
actions like breathing heart beat.
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• The Peripheral Nervous System Consists of a
• network or nerves that branch out from the CNS
  and
• connect it to the rest of your body.

• Somatic Nervous System Controls voluntary
• actions (using a fork, tying a shoe lace, etc.)

• Autonomic Nervous System Controls involuntary
• actions (contractions of the smooth muscles or
• adjusting the diameter of the blood vessels)

• Reflex An automatic response that occurs very
• rapidly and without conscious control.

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12. Concussion A bruise-like injury of the
brain. occurs when soft tissue of cerebrum
bumps against the skull.
Symptoms Head ache, blackout or
fainting, confusion, feeling drowsy after the
injury, nausea

• Paralysis A spinal cord injury where the cord
  is cut
• or crushed. Nerve impulses can no longer get
  through.

Causes Car crashes, Diving into shallow
water, football, horseback riding, skateboarding,
etc.
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14. PREVENT BRAIN SPINAL CORD INJURIES
Wear a helmet
Wear pads protective gear
Wear seatbelts in the car
Make sure water is deep enough to dive into FEET
FIRST, FIRST TIME!
Pay attention!