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RE: How did dromaeosaurs use their arms?



From: NJPharris@aol.com writes:

>> if the above is true, wouldn't
>>  developing forearms that enable you to hop, skip, jump, bound, change
>>  direction rapidly thus risk dislocating those very hip joints you say
are
>>  the cause of the problem in the first place?

>I would say no, as the hip joint in these situations would be kept 
>immobile--the entire animal, including the hindlimb, would rotate, as
opposed 
>to the body rotating relative to the hindlimb, as occurs when mammals turn.

OK, but now if the whole body is spinning on the foot like an iceskater or
ballerina, my preference is for the tail to wag the dog so to speak......

I don't see the need to complicate it further by waving your arms about....

cheers m