Reply to comment

It is interesting to think that the nervous system can’t know something unless it has a receptor for it. In this case the brain does equal behavior. We can’t react to external factors that we can’t sense. This makes me wonder about fear, and what fear actually is. Would it be correct to say that we have receptors for fear, or is that a completely different part of the nervous system? When we are scared of something we definitely have bodily reactions to it, such as nausea, chills, sweats, pupil dilation, adrenaline rush, and a lot of other things that are not necessarily controlled by our I-function. In a lot of situations, we feel scared or uneasy even before we see or smell anything. How does our nervous system know to be scared of something? Why does the nervous system react to fear without the I-function? Can the mechanism of fear be turned on or off, or cease to function at all?