Brain
Spinal cord
Nerves
DEMOSS CHIROPRACTIC
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The Nervous system
Is made of three main parts
Brain
Spinal Cord
Nerves
1. The Brain
 Control Center for
the body
 Weights about 3
pounds
 Is the size a
grapefruit
 Has 3 main parts
 Cerebellum
 Cerebrum
 Brain stem
Brain: the cerebellum
Cerebellum is located at
the back side of
head, near the back of
the neck area.

Controls voluntary
movement

Coordinates muscle
action for
 Running
 Walking
 Painting
 Balance
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Brain: the cerebrum
(The largest part of the brain,
at the top)

Controls our ability






To think
To remember
To feel
To dream
Talk
Sense
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Brain: the brain stem
 Brain stem (bottom)
 Controls involuntary
movement
 Basic life support like



Heart beating
Lungs breathing
Eyes blink
The Spinal Cord
 Our spinal cord goes from
the brain down the back
through the vertebral
column .
 The spinal cord forms the
main path for messages
entering amd leaving our
brain.
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Spinal Cord (cont)
The spinal cord is encased in
vertebra for protection.
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The Nerves
 The main part of the
nervous system.
 Nerves carry messages
throughout your body:
to, from, and within the
brain.
 Nerves are long and thin
like threads.
 They are bundles of
wrapped nerve cell
fibers, or neurons.
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Neurons
make up the
nerves.
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Nerves (cont.): neurons
 There are several types of
neurons, depending on function.
 Nerves
 Sensory nerves come
from the senses
 Motor nerves send
messages to muscles
and other parts of the
body from the brain in
response to a sensory nerve message.
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Nervous system: set of nerves, ganglions and
nervous centers that receive sensory signal.
Commands and coordinates vital functions.
Brachial plexus: network of nerves of the arm.
Intercostal nerve: cord conducting nerve
impulses between the ribs.
Radial nerve: cord conducting nerve impulses in
the area of the radius.
Median nerve: main cord conducting nerve
impulses in the upper limb.
Ulnar nerve: cord conducting nerve impulses in
the area of the elbow.
Lumbar plexus: network of nerves of the lower
back.
Sciatic nerve: cord conducting nerve impulses in
the area of the thigh and lower leg.
Common peroneal nerve: cord conducting nerve
impulses along the inside of the lower leg.
Superficial peroneal nerve: cord conducting
nerve impulses of the muscles and skin of the leg.
Digital nerve: cord conducting nerve impulses of
the fingers.
Sacral plexus: network of nerves of the sacrum.
Spinal cord: substance belonging to the nervous
system, found in the holes of the vertebrae.
Cerebellum: nervous centre situated under the
brain.
Cerebrum: seat of the mental capacities.
Diseases of the Nervous System
 Alzheimer disease (AD) is
 “Parkinson's disease is a
slowly progressive disorder
that affects movement,
muscle control, and balance.
Part of the disease process
develops as cells are
destroyed in certain parts of
the brain stem, particularly
the crescent-shaped cell mass
known as the substantia
nigra. “
 1998-2009 HowStuffWorks,
Inc.
where the cerebral cortex and
some other forebrain regions
shrink. It affects more
women than men.
 Broca aphasia is defined by
Websters Dictionary as a "loss
or impairment of the power
to use or comprehend words
usually resulting from brain
damage."