Perception Gestalt?

[oikodome]

Hi there!  I have a simple question that I guess is basic to everyone here.  I took first year psych as electives - I'm in the pre-medical program.  I remember learning something amazing during the perception module where the professor shows various examples of images that oscillate rapidly below the detection of our perception - as a result you're staring at a picture of an airplane with no engines when after around 10 seconds you can see that it actually does?  Does anyone know the name of this illusory effect?  I couldn't find it as I lost my laptop with powerpoint links.

Thank you so kindly!

[oikodome]

Thanks everyone.  No worries - I've asked my instructor and found the source.