If you strike the ligament immediately below the knee cap, the quadriceps muscle of the upper leg is slightly stretched, sending a sensoryāor inputāsignal to a motor nerve in the spinal cord, which then signals the quadriceps to contract, causing the foot to move forward. Only two nerves are involvedāsensory and motorāskipping the brain, so the reflex is very fast and also involuntary. In short, we donāt think about it; itās just an automatic reaction.
Physically, involuntary reactions are usually beneficial, enabling us to avoid injury and to make quick adjustments in our posture and movements. Regrettably, however, most of us live almost our entire lives emotionally reacting as though our brain were not involvedāa series of emotional knee-jerks.
From childhood we were taught a certain view of the worldāalmost always distortedāand we learned how to react to that view. For the rest of our lives we have automatically reacted to that lifelong view, rarely thinking about itāin most cases quite unaware of it.
Letās imagine, for example, that someone is unkind to us, and we have been conditioned by a lifetime of experience that unkindness is always painful. We then immediately feel pain and automatically do whatever it takes to reduce or eliminate that paināby lying, or attacking, or running. Our brain is minimally involvedālike a knee-jerkāwhich means we donāt really make conscious choices. We just react mindlessly, like animals behaving according to instinct.
Our involuntary reactions, unfortunately, are rarely emotionally productive. They simply reduce our pain for a short time, while the cause of the pain remains. We are caught in a cycle of knee-jerk reactions that neither eliminate our pain nor give us happiness.
We can learn to do better than this. We can engage our minds and hearts in a way that rises above mere reactions.