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1. Inside the Brain: Hacks 1–12 > 12. Build Your Own Sensory Homunculus

Build Your Own Sensory Homunculus

All abilities are skills; practice something and your brain will devote more resources to it.

The sensory homunculus looks like a person, but swollen and out of all proportion. It has hands as big as its head; huge eyes, lips, ears, and nose; and skinny arms and legs. What kind of person is it? It’s you, the person in your head. Have a look at the sensory homunculus first, then make your own.

In Action

You can play around with Jaakko Hakulinen’s homunculus applet ( http://www.cs.uta.fi/~jh/homunculus.html ; Java) to see where different bits of the body are represented in the sensory and motor cortex. There’s a screenshot of it in Figure 1-3.


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