[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: "wing muscles"

-----Original Message-----
From: Steve Gatesy <Stephen_Gatesy@Brown.edu>
To: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Sunday, November 07, 1999 9:01 AM
Subject: Re: "wing muscles"

>Pat Norton wrote:


Wing muscles in birds are not used
>>for flapping or for flexion or extension of the wing during flapping
>>but to act upon the feathers, radius, ulna and the carpometacarpus to
>>the wing airfoil shape to enhance manueverability.

So then,...it is generally thought that pterosaurs  >>didn`t<< use "wing
muscles" to adjust the camber of their wings (as noted in previous
discussions)? How do you know they didn`t? They had actinofibrils to
maintain stiffness and wing shape, but, were these passive structures, or
could they be modified by wing muscles? Is there any evidence for or against

Perhaps I should have stepped in and asked earlier when Jim Cunningham was
also taking part in this discussion, but I`m sure any of you could give a
proper reply.