How is an eyeball like an erection?

My next lecture in my neurobiology course is going to be about metabotropic receptors and how modulating internal cGMP levels is one way neuronal activity can be affected. I was planning to use the eye as an example of this process — but now Revere has inspired me to add a bit about the penis and viagra to the lecture. Here at UMM, we’re all about giving students information they can use.


  1. #1 Torbjörn Larsson, OM
    October 20, 2007

    Cuttlefish, ScienceBlogs spam blocker is really shy about scientific biological traits such as erections.

    Btw, I wonder why they think loosing sight and hearing is rare when sporting an erection? Better not remind them that added to this…, um, display of concentration, and orgasm “shuts down” the frontal cortex.

  2. #2 Torbjörn Larsson, OM
    October 20, 2007

    “display of concentration, and orgasm” – display of concentration, an orgasm