As I have posted about before, there are several different classifications of concussions. One such possible concussive area of impairment is the vestibular system. http://rethinkconcussions.upmc.com/2016/10/concussion-clinical-trajectories/
Unfortunately, this is one of the deficiencies I have had experience with since my concussion. Your vestibular system is the balance center of the brain — affect one’s ability to interpret motion, coordinate head and eye movements, or stabilize vision upon head movement.
In my own laymen’s experience- my vestibular system allows my body to figure out where it is positioned, at any given time, and also interpret movement around me. When the vestibular system is taxed, the brain automatically begins to rely more on input from your eyes, thereby exhausting that system further. Even to this day- if I am asked to close my eyes and balance on one leg, I VERY quickly lose my footing. When my accident occurred, I had two toddlers. This proved to be very challenging. Just imagine how many times we, as mothers, crouch down to tie shoes, fasten clothes, or give hugs. Now imagine again that each of the incidents were extra-taxing for the brain. It was a chore not to lose my balance each time I crouched down, which was quite often, and exhausted my brain even more.
During my time in Vestibular therapy, I worked with Dr. Anne Mucha, the preeminent therapist in the UPMC Sports Medicine program. Anne took care of me when I would wake up with spontaneous vertigo. She also worked with me when I had space and motion disorder. She put me through the paces in therapy for 9 months- and boy, it was thoroughly exhausting. I wasn’t able to drive myself to these appointments, and sometimes, my brain would be so taxed that I would fall asleep on the twenty minute ride home. In fact, I would often be so fatigued that I would have to sleep for hours after our appointments. While I wasn’t able to fully recover from my vestibular issues, I know that I had the very best working with me to help me heal, and for that, I am thankful.
The Concussion Chronicles 