I was on another health board that I frequent for hypopituitarism and someone mentioned that they recently were diagnosed because they were having "non-epileptic seizures" (or psycho-somatic seizures) in the ER and it was determined by a savvy endocrinologist just before being discharged that she was experiencing the seizures due to low cortisol.

I wasn't able to find too much about it other than these two some-what relative articles:

A PHD explaining some causes of seizures in her "practice" (I'm not exactly sure what her practice entails, she is not a medical Dr.) but it might be worth further investigation for you...

http://www.wnho.net/seizures-convulsions.pdf

And this:

"When the sodium level drops too low patients may get quite sick and have seizures."

from page 13 of this:
http://www.pituitarysociety.org/publ...ismEnglish.pdf

It might be valuable for you to see an endocrinologist to get a hormone panel ordered to see if you have any deficiencies.

If cortisol gets low enough, it can be life-threatening.

Hormone deficiencies can be caused by concussions, or a concussion, which I've posted a LOT about in other threads and in some of the stickies at the top of the forum.