Transcript The Nervous System

The Nervous System
Don’t be nervous… you’re going
to learn a lot!
Central Nervous System CNS
Your brain and spinal
cord
As big around as your thumb
Made of neurons bundled
together.
Passes impulses to and from
brain.
Protected by your vertebrae
Spinal Cord Injury
• Sensory information
cannot get to the
brain
• Motor messages
cannot get to the
body
• Your brain loses
control of some parts
of your body
Peripheral Nervous System - PNS
Includes all the nerves
branching off of the
CNS.
*The PNS uses nerves
to connect all parts of
your body to the CNS.
Neurons
• All nerves are made of neurons. Neurons
are nerve cells that send electrical
messages around the body.
Neurons transmit electrical messages to and
from the CNS, called impulses.
http://www.youtu
be.com/watch?v
=TKG0MtH5crc
Sensory Neurons
• Sensory neurons sense changes in or
outside your body.
• They use receptors to detect the
changes.
• Sensory neurons send messages about
your body or environment to the
spinal cord up to the brain for
interpretation.
Motor Neurons
• Motor neurons send impulses from the
brain down the spinal cord to parts of your
body.
• They make the body do stuff.
• The brain will interpret messages and
send an impulse back to the body for
action!
What nerve!
As a class, we are going to pretend to be
neurons. Let’s organize ourselves into a
nerve and send messages to and from the
brain!
How do neurons send messages?
• Neurons receive impulses
on their dendrites.
• When a neuron receives
an impulse, it passes the
message along to the
next neuron.
• The message is passed
from neuron to neuron
until it gets to the end of
the nerve.
My brain is like a ……
• What is your brain like?
• Make a simile and explain why your
brain is like a “….”
• Illustrate your page.
• Graded, due tomorrow!
Parietal
Occipital
Temporal
FrontalLobe
Lobe
LobeControls:
Controls:
Controls:
– Sounds
Sensory
Sight
– Reasoning
and
and
information,
visual
language
, motor
stimulus
pain
skills,pressure,
cognitionheat
(thinking),
emotion,
– touch
The
formationfeelings,
of memories