The awareness of sports related concussions has increased dramatically in recent years. A part from the initial "bell ringing" physical symptoms such as headaches, sensitivity to light, and fatigue can hinder an athlete's confidence in returning-to-play. Often the psychological impact of concussions go largely unnoticed because the physical symptoms are more apparent. Here is a great article published by the NCAA that talks about the emotional reactions to a concussion.
Click Here for the article