[johnsmith4739]

For what's worth - we have 2 perception systems, top down (essentially pattern recognition) and bottom up (requires sense-making). When we experience something that doesn't fit the first - automatic - our homeostasis is diminished as we experience less orientation/control ("what's this?"). Surprise is the emotion that activates this reassessment of our approach to the given stimulus. Quickly followed by our attention and then cognitive appraisal of the given stimulus that wasn't classifiable by the top-down automatic system.

The "uncanny" experience is given by this dissonance - "it looks like a face while it's not a face" - and it is just a shape of surprise as emotion. Surprise is a short lived emotion, quickly followed by a different one. The unease associated with the idea of "uncanny" is when we experience disgust as the second emotion. Not everybody experiences that. Some of us experience another emotions, like anticipation/curiosity.

The need for orientation, or to understand what is going on, is tightly interwoven with a sense of control. To have clarity about a situation is to have a sense of control and options become more apparent. When we don’t know what is going on in our environment, there can be high levels of stress and anxiety.