Cognitive can be more than the things you have listed. I have been told that many of these symptoms come from damage to parts of the brain and possibly neck. Vestibular, oculor-motor, etc. Tinnitus is a big symptom for brain injury. I would get vestubular therapy and or vision testing by a neuro opthamologist.

My IQ whatever that means was not affected but i feel horrible and can't function well. This apparently is good news.

Good luck!!!!