The subject of this research is certain informative principles of functionality of human nervous system. In the limelight is the interdependence of consciousness and information, as well as the question in the spirit of anti-physicalist arguments: whether the conscious processes are informative, and thus physical, or require a categorical apparatus for description? The first part of the article discusses possible wording of some informative principles of functionality of nervous system that answer the question “why” rather than “how”. The second part is dedicated to the general classification of causal environments, as well as description of conscious processes within the framework of new possible terminology. A number of hypotheses is advanced on the informative mechanisms of involuntary and voluntary attention. With regards to involuntary attention, the author examines the mechanism for resource conservation, or filtering information, which suggests that the nervous system tends to consume resources for processing the rarer – and more information capacious messages. Such position complies with the law of conservation of energy. Voluntary attention is viewed on the basis of information interpretation of the Le Chatelier’s principle. Voluntary attention, resulting conscious actions, and responses of the nervous system (including creativity) are considered as informational messages aimed at alleviation of the impact of external environment, namely the level of information uncertainty. Such information approach prompts to view consciousness as a non-system or causal environment, within which causality is transmitted without transmitting information. The article provides the variant of classification of causal environments that may contribute to further development of non-informative (non-physicalist) approach towards the problem of consciousness.