If
I mention the contents of articles and text books and don't quote the source, I
am in the dogbox. If I do give the source of the information, I am also in the
dogbox. I am happy to be in the dogbox, but I will nevertheless say my say,
whether you like it or not. Let’s just make sure we practice what we preach. Don’t
you know, What is good for the goose is good for the gander.
Benefits
of the current RLN setup (the
left recurrent laryngeal nerve is not poorly designed, but rather is clear
evidence of intelligent design):
Much
evidence exists that the present design results from developmental constraints.
There
are indications that this design serves to fine-tune laryngeal functions.
The
nerve serves to innervate other organs after it branches from the vagus on its
way to the larynx.
The
design provides backup innervation to the larynx in case another nerve is
damaged.
No
evidence exists that the design causes any disadvantage.1
Cofty,
see what I wrote to Cantleave. I don’t want to keep on repeating myself.
But
to add to that, some of us prefer to look at the big picture. If one asserts
that the RLN is a poor design you assume that a better design exists, a claim
that cannot be asserted unless an alternative embryonic design from fertilized
ovum to fetus - including all the incalculable molecular gradients, triggers,
cascades, and anatomical twists and tucks - can be proposed that documents an
improved design. After this had been accomplished, such a person can criticize
the existing design to his heart’s content. Until then, shut up or ship out.
1.
Bergman, J. 2010. Recurrent Laryngeal Nerve Is Not Evidence of Poor Design. Acts
& Facts. 39 (8): 12-14.
Dr.
Bergman is an Adjunct Associate Professor at the University of Toledo Medical
School in Ohio.