Brain Structure And Function
The brains
is made up of two halves different areas of the Brain Structure And
Function have different functions.
The nerve
cells in the brain about 100 billion of them, are connected to one another and
transmit information.
Our brain of
the nerve cells is expanded through learning and training our brain control sour actions, regulates our sleep and allows us to feel sensations like pain and
joy.
Brain Structure And Function
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Brain Structure And Function |
If it is damaged maybe due to a stroke one has to relearn a lot of things like speaking walking or eating.
How do nerve
transmit signals
Sings
transmission through nerve cells is quite complicated.
Like all the
other cells, nerve cells a nucleus, there are fine extended branches known as
dendrites and a long {tail} called the.
Axons in the
brain are smaller than 1 mm whereas in the spinal cord they can be long as 1m.
A chemical substance
is released through an electrical impulse into the synapses present at the end
of the axon.
This
chemical substance known as the neurotransmitter is transferred to the dendrite
of another nerve cell and the signals are transmitted.
Why do we feel pain
Pain is a
warning signal telling us that there is some danger threatening out health.
We feel pain
through specific receptors, the sensors in the skin these can also be found in
the organs and the presidium.
Our body has
two pain systems a fast one and a slow one if our hand touches a hot object we
withdraw it instinctively without even thinking.
This is fast
pain system in action however the pain that comes later due to the burning skin
or a blister, is transmitted by the slow pain system to the brain.
It is the
store of things learned and retained from out activity or experience.
What is memory
Experiences
impressions skills habits and many our memory is a collection of knowledge
other things.
It given us the ability to learn and adapt from
previous experiences as well as to build relationships.
Computer of
the world can match its performance it has a lifelong storage capacity and no.
Short term
memory is the information that we are currently thinking which we have
experienced and would not like of forget are transferred form short-term memory
into long term memory.
What is a stroke
A stroke is
a serious medical conditions occurring as a result of an interruption in the
supply of oxygen to the brain.
The most
frequent reasons stroke is the blockage or bursting of a blood vessel in the
brain.
In both
cases the blood circulation and hence the supply of oxygen to the brain is
interrupted the.
.result is damaged brain tissue stroke patients may lose all
information that was stored in the damaged area and may have to relearn simple
things like walking swallowing or writing.
Sometimes
the brain can build new connections between the and repair the damage
Why must we sleep
We may not know
exactly why we need to sleep but we do know that our body needs sleep to rest
and recover.
If the sleep
is inadequate performances of the brain Brain Structure And
Function and the body goes down one becomes
irritable and cannot concentrate.
After
several days of inadequate sleep needed depends on the person and the age while
most babies sleep for more than 12 hours a day some old people need only 5-6
hours of sleep.
Only half of
a dolphin’s brain sleeps the other half remains awake so that the animals can
emerge from water to get air.
People can
still feel pain called phantom pain in the amputated limbs for instance they
feel pain in the right heel, although the right foot is amputated and is no
longer there.
Deceive your senses
A battery
operated screwdriver a white cardboard sheet on which a black spiral is drawn
starting from the middle diameter approx.
20 cm) some
wire a chair an adult
Fix the
cardboards sheet firmly on the screwdriver with the help of the wire so that it
does not wobble.
The spiral
must face forward switch on the screwdriver.
Put your
hands on your thigh and look at the constantly moving spiral for about 3
minutes then look at your hands.
