The Brainy Body
Your brain is as big as your two fists side by
side. It’s the place where you think,learn,work out problems, remember, feel
happy and sad, wonder, worry, have ideas, sleep and dream.
Yet the brain looks like a
wrinkly lump of grey-pink jelly on average, it weighs about 1.4 kilograms. It
doesn’t move, but its amazing nerve activity uses up one fifth of all the
energy needed by the body. From the motor
ceter, sorting
The main part of the brain is
its bulging, wrinkled upper part, the cerebrum. Different areas of its surface
(cerebral cortex) deal with nerve signals to and from different parts of the
body. For example, message from the eyes pass to the lower rear part of the
celebrum, called the visual center. They are sorted here as the brain cells
work out what the eyes are seeing.
There are also areas for touch,hearing,taste and other body processes.
The cerebellumis the rounded ,wrinkled part at the back of the brain. It
processes message from the motor center,
sorting and coordinating them it great detail, to send to the body’s hundreds
of muscles. This is how we learn skilled, precise movements such as writing,
cycling or playing music (or all three), almost without thinking.. every second
it
The brain stem is
the lower part of the brain , where it joins the body’s main nerve, the spinal
cord. The brain stem controls basic processes vital for life, like breathing,
heartbeat, digesting food and removing wastes.
The brain really
does have “brain waves”. Every second it receives sorts and sends millions of
nerve signals. Special pads attached to the head can detect these tiny
electrical pulses. They are shown on a screen or paper strip as wavy lines
called an EEG, electro-encephalogram
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