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Re: Some anatomical terminology (was Re: dinosaur books)
At 02:43 PM 1/5/98 -0500, Mickey P. Rowe wrote:
>Stanley Friesen <firstname.lastname@example.org> wrote:
>> Parallel to the axis connecting the head (cranium) and the tail
>Although I may get shot for this, I *think* the singular there
>should be caudum just as cranium is the singular form of crania.
You made me look it up :->
According to my dictionary it really is "cauda", a feminine a-stem.
> But in any
>case I'm more concerned with the fact that in context this term may
>mean more than just parallel to said axis. It may also indicate a
>directionality -- toward the tail (as opposed to caudocranially --
>toward the head).
Oops. Yeah, I missed that subtlety. (I would probably have gotten it if I
had the actual context in front of me, as usage usually makes that sort of
thing fairly obvious).
>>Similarly a direction may be implied by "dorsoventrally".
>> Branches. A general term for any vaguely rod-shaped extensions of a
>> bone. The singular is ramus.
>Actually it's a general term for anything that can be described as
>branch-like. That can be gills, legs, nerves or even phylogenies,
>etc. etc. ...
That is picking nits :-)
I would say that "*vaguely* rod-shaped" means about the same thing as
>> > Anteroposteriorly
>> Parallel to the axis the front (anterior) and rear (posterior).
>> Essentially synonymous with "craniocaudally".
>This one really got to me... These two terms are not synonymous
>except within specific contexts. While it's true that modern
>reconstructions of dinosaurian postures make the terms virtually
>interchangeable in *modern* descriptions of dinosaurs, ...
> In human or Godzillan anatomy the two axes are roughly
>perpendicular to each other.
Hmm, I suppose I got a little confused here. So many of the terms in
question are defined independently of posture, I kinda expected this one to
be so also.
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