Sensory processing disorder (SPD) occurs when the brain and the body cannot properly process and modulate the sensory input coming in. This causes a negative, adverse reaction to the incoming sensory input. This in turn negatively affects the individual’s life, on a DAILY basis. Sensory quirks are the smaller, less significant sensory things you seek out or avoid throughout the day. For example: chewing gum to stay focused, or fidgeting with your pen while listening to a lecture, or disliking...