I also got this flat effect and also lost the ability to pray. I never realized I need my emotions to pray! It all came back yesterday and I remarked to my husband how good it felt to be alive. He laughed and said that is what almost all concussion victims say, even though very few people die from it, the brain thinks it is dying. I am only on week 2 of recovery and still have problems with other things like walking. My hit was also on the front part of my head. Im not an expert but others are saying that you will recover. In the meantime please remember this flat feeling is really your body telling you to rest and not try to experience relationships and emotions during this time. The only answer I could get from trying to pray during my flat phase, was that I couldn't pray because I was supposed to be resting, not talking!! Wishing you a speedy and full recovery.