Received an update on Melissa from my mom:

The CT scan was negative for problems. The doctor said that Melissa had the lowest magnesium levels he had ever seen and that she also had a low sodium level but they do not seem to think this caused the seizure. Melissa can open her eyes but is unable to respond verbally at all. She has been treated for the magnesium and sodium problem and those levels are returning to normal. They have her scheduled for an MRI tomorrow.
Thank you for keeping her in your prayers.