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 This
site,http://www.cs.uta.fi/~jh/homunculus.html,
gives a visual and text explanation of both motor and sensory
homunculus.
Motor homunculus—larger parts of the
brain control larger parts of the body such as the hand and
mouth, which require a lot of “motor” or motion
“signals.” That
is, if the human body were to be built in proportion to its
motor significance because of the brain power needed to
“motor” them, the hands and mouth would be proportionally
bigger. See
illustrations below for both motor and sensory homunculus from
these sites: http://www.boingboing.net/2004/12/12/bodies_proportional_.html
http://jwz.livejournal.com/422384.html
Sensory homunculus—Similar to motor
homunculus but it tells the brain how much power is needed for
sensory perception of different body parts.
Homunculus is Latin for “little man.” -
http://en.wikipedia.org/wiki/Homunculus
The models below show why the issues
associated with autism include motor and sensory perception
challenges because of how these parts of the body require much
attention from the brain.
Motor Homunculus:
"This model shows what a man's body
would look like if each part grew in proportion to the area of
the cortex of the brain concerned with its movement." - http://jwz.livejournal.com/422384.html
________________________________________
Sensory
Homunculus:
"This
model shows what a man's body would look like if each part grew
in proportion to the area of the cortex of the brain concerned
with its sensory perception." - http://jwz.livejournal.com/422384.html
Amazing sensory swings! Click on
pictures below!
  
http://www.out-of-sync-child.com
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