Re: Theropod / Bird Arm Movement

["Williams, Tim" <TiJaWi@agron.iastate.edu>]

Somebody asked me this question off-list, and I thought I'd throw it open to
the DML (with the author's express permission).  It's actually a very good
question (IMHO):

> The arms(=wings) of birds move so the movement at the elbow is linked > to
movement at the wrist [when one flexes the other extends etc]. Did 
>(1) archaeopteryx and (2) the theropodan close relatives of birds, also 
> show this kinetic linkage ? Can you tell just from the skeleton; or do
>you need muscles also ?



Tim