Concussions are extremely common in our society — an estimated 75% of all people will experience one in their lifetime!The majority of people recover completely from concussions within a week or two; yet, for a considerable number of people, the negative effects can last for months and even years. Mood symptoms like anxiety, irritability, and depression coincide with physical symptoms like headaches, fatigue, nausea, and dizziness; added to that are cognitive symptoms like problems with memory, decision making, and concentration difficulties. This constellation of symptoms is known as postconcussion syndrome (PCS).