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So far, Lucy's brain has controlled her eye movements, learned to discern boundaries and enabled her to learn to recognise simple shapes. I could hold up an apple and a banana anywhere in front of her and she could tell them apart. Orangutans are particularly partial to bananas, so the next task was to enable her to learn to point at the banana. To do this I developed a modified version of her Superior Colliculus - essentially a neural servomechanism. Given a target in visual space it would automatically guide her arm in shoulder-centred space until it pointed to that target. This servo process is central to the theories behind Lucy, and again is discussed at greater length in my book. Here's the very simple servo map that controlled Lucy's arm. Handling more complex movements than this requires some interesting additions to the process that I hope to be able to develop using Lucy MkII.
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Copyright © 2004 Cyberlife Research Ltd. |
