1.
Danish psytrance producer Andreas Riemer Christensen.
http://www.ektoplazm.com/profiles/amygdala/ 2.
A swedish death metal band. Are yet to release a full album. The demo "Controlling the Fear" is downloadable at their homepage:
http://www.amygdalasite.com/ 3.
Japanese avant-prog band: http://www.progarchives.com/artist.asp?id=3365 4.
a german ethereal/neoclassical group lead by Dirk Schlömer. released one album, "Memento Mori - A Mosaic of Transitions in 9 Parts", on Hyperium in 1997. http://www.amygdalandmusic.de

Read more about Amygdala on Last.fm.