Visitors Now:
Total Visits:
Total Stories:
Profile image
By Sauropod Vertebra Picture of the Week
Contributor profile | More stories
Story Views

Last Hour:
Last 24 Hours:

Path of the recurrent laryngeal nerve in frogs, giraffes, and elasmosaurs

Saturday, October 1, 2016 18:29
% of readers think this story is Fact. Add your two cents.

(Before It's News)

Frog RLN ventral view - Ecker 1889 plate 1 fig 115 - RLN highlighted

Just posting a few images from my impending talk at SVPCA this Thursday.

I’ve written about the recurrent laryngeal nerve before, in Wedel (2012) and in this post. It’s present in all tetrapods, from frogs and salamanders on up. The frog RLN is shown in ventral view above, and in lateral view below, both from Ecker (1889:plate 1, figures 114 and 115). I’ve highlighted the RLN in red in both. Perhaps not a monument of inefficiency, but still recurrent, and therefore dumb.

Frog RLN lateral view - Ecker 1889 plate 1 fig 114 - RLN highlighted

And in a giraffe – RLN in blue, nerve path to hindfoot phalanges in red. Hollow circles are nerve cell bodies, solid lines are axons.

Giraffe skeleton silhouette 1000 with nerves

And in the elasmosaur Hydrotherosaurus, same color scheme plus the nerve path to the tail in purple, base image from Welles (1943).

Hydrotherosaurus nerve pathways 4 - RLN pathway

That’s all for now!


Report abuse


Your Comments
Question   Razz  Sad   Evil  Exclaim  Smile  Redface  Biggrin  Surprised  Eek   Confused   Cool  LOL   Mad   Twisted  Rolleyes   Wink  Idea  Arrow  Neutral  Cry   Mr. Green

Top Stories
Recent Stories



Email this story
Email this story

If you really want to ban this commenter, please write down the reason:

If you really want to disable all recommended stories, click on OK button. After that, you will be redirect to your options page.