  The way we view the reality of nature, including ourselves, depend on
consciousness.It also defines the identity of the person, since we know people
in terms of their experiences. In general, consciousness defines human
existence in this universe. Furthermore, consciousness is associated with the
most debated problems in physics such as the notion of observation, observer,in
the measurement problem. However,its nature, occurrence mechanism in the brain
and the definite universal locality of the consciousness are not clearly known.
Due to this consciousness is considered asan essential unresolved scientific
problem of the current era.Here, we review the physical processes which are
associated in tackling these challenges. Firstly, we discuss the association of
consciousness with transmission of signals in the brain, chain of events,
quantum phenomena process and integrated information. We also highlight the
roles of structure of matter,field, and the concept of universality towards
understanding consciousness. Finally, we propose further studies for achieving
better understanding of consciousness.
