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  #1  
Old 08-21-2003, 11:18 AM
drhess drhess is offline
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pulleys in the human body

Are there any systems in the human body that work (sorta) like a pulley?
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  #2  
Old 08-21-2003, 11:48 AM
Dogface Dogface is offline
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Sorta, yes. At least some extensor muscles (triceps, for example) for the major limbs have some sorta lika pulley action. Their tendons go over the elbow point and pull across it in a pulley-like action. It's not a proper pulley, of course, but it does translate direction of motion by pulling a flexible "string" across a roundie bit.
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Old 08-21-2003, 05:01 PM
Mangetout Mangetout is offline
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The tendons of the hand also, but again, this is only like a simple pulley system, not a compound one.
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Old 08-21-2003, 11:56 PM
Paul in Qatar Paul in Qatar is offline
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What holds back a pulley system is that no animal has anything like a wheel inside them. (Well, maybe a dog does after eatting Tonka truck, but not usually.)
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  #5  
Old 08-22-2003, 12:27 AM
Pasta Pasta is offline
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Two of the six muscles that move the eye (the inferior and superior obliques) run through "pulleys". See here, for instance:

http://cim.ucdavis.edu/Eyes/eyeAnat.gif
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