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Brain Matters
Your own built in
personal computer!
Did you know?
The human brain only weighs 3lbs.
It consumes up to 20% of your body energy
The brain makes up less than 2.5%
of your total body weight
The main sources of energy for
your brain comes from
glucose and oxygen.
Your whole body is made up of
cells
This is the nucleus of a cell
These cells make up the
Central Nervous System
The CNS or central nervous system includes the:
brain
spinal cord
endocrine
They provide most of the control functions
for the body
Your CNS!
Glial Cell
Although there are about 100 billion neurons
in the brain, there are about 10 to 50 times
that many glial cells in the brain.
Star-shaped cells that provide physical and
nutritional support for neurons:
1) clean up brain "debris”
2) transport nutrients to neurons
3) hold neurons in place
4) digest parts of dead neurons
5) regulate content of extra cellular space
JANITORS
OF
THE BRAIN!!!
Interesting beliefs about glial
cells
During brain development they act like
a scaffold for neurons to climb to the
cortex (brain).
It is believed that the migration can go
wrong and show up later as epilepsy,
dyslexia, and maybe schizophrenia.
Brain Development
•The embryonic cells
divide to generate
new neurons at the
astonishing rate of
250,000 per minute.
A NEURON
Details of a neuron
•B is the
axon
•A is the
myelin
sheath
•C is the
cell body
•D is the
dendrite
The body is made up of billions of cells.
Cells of the nervous system, called neurons,
are specialized to carry "messages" through
an electrochemical process. The human brain
has about 100 billion neurons.
How Neurons Communicate
Communication of information
between neurons is made
possible by movement of
chemicals across a small gap
called the synapse. Chemicals,
called neurotransmitters,
are released from one neuron
at the pre-synaptic nerve terminal.
Neurotransmitters then cross the
synapse where they may be accepted
by the next neuron at a specialized
site called a receptor.
Interesting Facts about Neurons
Scientists believe you are born with what you get,
but research is challenging that.
About 100 billion neurons do not regenerate
on a regular basis like other cells.
Neurons communicate unlike other cells,
by means of electrical and chemical energy.
Parts of your brain
The Frontal Lobe
* is the largest part of the cortex
*allows you to move parts of your body at will
*it also allows you to think about the past
and plan for the future
*it allows you to focus your attention,
reflect, make decisions, solve problems,
and engage in conversation
The Parietal Lobes
*is the flat plate like area in each hemisphere
*this is where:
temperature from our environment
touch
pressure from the skin
and the position of our limbs occurs
sensations of pain
The Occipital Lobes
*are located at the back of the brain
Through research scientists
have discovered that there
are:
motion sensitive cells
color sensitive cells
strait line cells
This is where your
vision is processed
The Seeing Brain
The Temporal Lobe
This part of the brain
is concerned with
perception and
recognition of auditory
stimuli (hearing) and
memory (hippocampus).
Language can be effected by
temporal lobe damage. Left
temporal damages disturb
recognition of words.
Right temporal damage
can cause a loss or
inability to talk.
You Think You Have Brains!
A bottle-nose dolphin brain
weighs between 1,500 and
1,600 grams. An average
adult human brain weighs
about 1,400 grams.
The brain of a dolphin appears to sleep
one hemisphere at a time.
How can I take
care of my brain?
Build up those
neurons and
Visit your make those
connections in
Did you know you need
doctor
at least 9 hours of
regularly. school!
sleep a
PROTECT
Good nutrition is
night?
YOUR
equally important.
BRAIN!
Exercise increases
blood flow to
the brain.
Try to live a Vitamins are essential!
stress free
life.
Stay Away From Drugs!