atrophy of proprioception

Atrophy of proprioception. Every being on earth begins with zero internal structure, no capacity for memory, and no capacity to create it. Consequently, each being is not actively aware of any perceptual developments it does not have, as the capacity to perceive is not yet constructed. So it is with muscle and nerve development - one cannot rely on active signals for deficiency. The nerves do not exist yet, so no signals are present. And only after the organism has come to rely on active data, does it actively notice a deficiency, when the nerves go missing.