I've heard of them resulting from a history of personal child sex abuse

I've not heard of them until your post. My children suffered from night terrors and uncontrolled crying for reasons they did not know. these two things in themselves were heartbreaking and scary. I can't imagine suffering from Psychogenic seizures. Or watching my child suffer.

Is this something you are dealing with? If so, how?

My older daughter was molested by her uncle. We always hoped/prayed that he never touched our other daughter with down syndrome. We may never know. Our DS daughter recently started having seizures, but they did the tests & are not seizures. The doctor says they are only caused by trauma, mostly women that had been sexually abused. People w/DS have a higher likelihood of having seizures, but it doesn't seem in her nature to 'fake' them for whatever reason. It puts me into panic mode again just thinking about it... I was just wondering if or how many others may be experiencing this...

One thing I have learned from therapy is that the body responds when your brain can not. for example, I was keeping in my emotions and not talking about things. I started getting sick, having anxiety attacks, migraines, losing hair.

My body was telling me "hey, you need to pay attention to what you are feeling. I am going to keep pushing you until you do"

In your daughters case, perhaps she can not verbalize her thoughts and feelings, or perhaps she can't even remember or comprehend it. But her brain and body are releasing the trauma in the only way it knows how right now.

Correct Lusks1.
I'm not a neurologist, but I work in the medical profession.
Many providers shame people who have psychogenic seizures and cast them a faker. While I do believe some people truly do fake for serious psychological reasons otherwise, I also believe that actual psychogenic non faking seizures are not an act of faking rather just like lusks1 described - your body responding when your brain cannot. what characterizes these seizures from true seizures are some traits that are specific to epilepsy that your child is not displaying. You ought to change providers for your child if she is being labelled a faker. It's not uncommon for providers to have this viewpoint. I've discussed psychogenic seizures w top neurologists because psychogenic seizures often occur in the hospital setting. No one can prove its faking and truly it does seem more like a migraine as Lusks1 describes. If stress can make you have a migraine, why can't it present thru your body in other ways. I truly do not fake my migraines or use them for any advantage.

I didn't know what these were until you asked, and I became curious and googled them. Wow, does that sound similar to something I once observed my daughter do. Before disclosure, during her teens, she suffered mysterious back pain for years, and nothing helped for more than a few minutes. Once the pain gripped her so badly that she appeared to seize for several minutes. We spent thousands of dollars visiting doctors and massage therapists in two different states, hoping at least to dull the pain.

Recently she admitted to me that a lot of the "pain" was acting. She was desperate for attention, probably to fill the alone spots within her. While I'm relieved to know that she wasn't suffering physical pain, knowing that she suffered enough psychic pain to "fake it" for my attention is at least as saddening to me. So it hardly matters if seizures are "real" or not -- the cause may be more devastating and difficult to cure than anything truly physical in nature.

This quote from http://www.epilepsy.com/article/2014/3/truth-about-psychogenic-nonepileptic-seizures pretty much sums up, and is consistent with, my own experience in dealing with my daughter's "psychosomatic" illness:

“Somatoform disorders are very difficult to treat because as soon as you extinguish one symptom another one pops up. These disorders consume a lot of time, money and tend to invoke a tremendous amount of frustration on the part of the healthcare professionals working with this population,” said Susan Kelley, Ph.D., Professor of Behavioral Health at the University of South Florida, Tampa, and psychotherapist in private practice.

Frustration on the part of healthcare professionals, sure. Not to mention anxiety among family members dealing with this suffering.

Thanks all. My daughter is seeing a play therapist now. We'll see what happens, I believe this is God's Plan. Just not sure what he's trying to tell us yet, so I'm being patient. My husband does not believe that his bro is sick enough to touch a little girl w/DS, but I believe if he's sick enough to touch a 4 year old & both of his sisters, then he's sick enough to touch her.

The sad part is that I almost (Almost, I really don't want it to be true) want this to be true so I can prosecute the MF. None of the other known victims have prosecuted him. But this would be my vengeance, it would not be in the best interest of my children. I truly hope (almost) that this is not the cause of her Psychogenic seizures.

I think I should start to see my therapist again for this anger that has been renewed in me. This stuff just never goes away.

I know the feeling I still don't know if my boys were molested they have not talked about it happening and they know a lot now about grandpa and body safety and they have no reason not to tell me if they remembered something but they may just not remember makes me angry also. Sorry your going through this but all we can do is put our trust in God to care for us and our children through the healing.