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Nervous System

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Title: Nervous System Author: Jenny DePoint Last modified by: Eric Kaluza Created Date: 1/22/2009 2:24:57 AM Document presentation format: On-screen Show – PowerPoint PPT presentation

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Title: Nervous System


1
Nervous System
  • How it functions, keeps us alive and what goes on
    inside.

2
What is the Nervous System?
  • Composed of your
  • Brain
  • Spinal Cord
  • Nerves
  • It is how we receive information about EVERYTHING
    we do in life.

3
Nervous System Sections
  • The nervous system is divided into two different
    sections
  • Central Nervous System
  • Spinal Cord
  • Brain
  • Peripheral Nervous System
  • Sending signals to all other tissues in the body.

4
Central Nervous System
  • Brain
  • Spinal Cord

5
Parasympathetic-Autonomic
  • Most active at rest
  • Organs include
  • Eyes
  • Salivary glands
  • Heart
  • Lungs
  • Pancreas
  • Gall Bladder
  • Intestines
  • Bladder

6
Sympathetic-Autonomic
  • Fight or Flight
  • Increase heart rate
  • Skin is pale and sweaty
  • Blood to the muscles

7
Brain Fun Facts
  • If stretched out, the cerebral cortex would be
    0.23 sq. m (2.5sq.ft), the area of a night table.
  • The composition of the brain 77-78 water,
    10-12 lipids, 8 protein, 1 carbs, 2 soluble
    organics, 1 inorganic salt.
  • The brain can stay alive for 4 to 6 minutes
    without oxygen. After that cells begin die.
  • The slowest speed at which information travels
    between neurons is 260 mph!!!

8
..continued
  • The energy used by the brain is enough to light a
    25 watt bulb.
  • More electrical impulses are generated in one day
    by a single human brain than by all the
    telephones (including cell phones) in the world.

9
How much does human brain think per day?
  • (In other words, how many thoughts does it have
    per day?) Take a guess

10
How much does the human brain think per day?
  • 70,000 is the number of thoughts that it is
    estimated the human brain produces on an average
    day.

11
The Brain
  • The COMMAND CENTER for
  • Thinking
  • Processing
  • Actions
  • Ideas
  • Emotions

12
Spinal Cord
  • The brains best friend
  • Relays messages from all parts of the body to the
    brain.
  • It receives the message from the brain and relays
    the brains message to muscles, glands, etc.

13
(No Transcript)
14
Peripheral Nervous System
15
Peripheral Nervous System
  • Involves all the nerves of the body.
  • Two distinct types
  • Crainial nerves that are from the brain. Receives
    information from the spinal nerves.
  • Spinal-Supplies the rest of the body
  • All the bodys nerve tissue that is not in the
    brain or spinal column.
  • Its function is relay messages from the outer
    portions of the body back to the brain.

16
Peripheral Nervous System
  • Two Main Parts
  • Somatic System actions that you control (Ex
    looking, playing basketball, writing, catching or
    anything that requires you to think)
  • Autonomic System actions that you do NOT control
    (Ex heartbeat, breathing, digestion or anything
    you do not consciously control.)

17
How Do We Receive Information?
  • Through
  • Touch (Blindfolded.. Hand by stove)
  • Hearing (Scratching on chalkboard, loud screaming
    baby).
  • Sight (Looking at a painting, a cute puppy or the
    ocean from the top of a mountain).
  • Taste (Homemade chocolate chip cookies, bacon or
    chipotle.)
  • Smell (BBQ in the summer time or cinnamon buns
    baking in the kitchen at school).

18
Spinal Cord Injuries
  • Paraplegic vs.. Quadriplegic
  • Both involve damage to the spinal cord. The
    difference depends on where the damage is on the
    spinal cord.
  • Paraplegic Paralysis from
  • the waist down
  • Quadriplegic Paralysis of all
  • four limbs. Can affect respiratory,
  • bowel, bladder, and sexual functions
  • as well.

19
Brain Injuries
  • Concussion
  • Impact great enough where it breaks through the
    meninges.

20
Concussions
  • http//www.youtube.com/watch?vfFkWTGKNLT8
  • Symptoms of a concussion may include
  • "seeing stars" and feeling dazed, dizzy, or
    lightheaded
  • memory loss, such as trouble remembering
    things that happened right before and after the
    injury
  • nausea or vomiting
  • headaches
  • blurred vision and sensitivity to light
  • slurred speech or saying things that don't
    make sense
  • difficulty concentrating, thinking, or
    making decisions
  • difficulty with coordination or balance
    (such as being unable to catch a ball or other
    easy tasks
  • feeling anxious or irritable for no
    apparent reason
  • feeling overly tired

21
Questions???
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