Freud, already in his manuscript "Project" (1895), presents a hypothesis on the connection between mental functions and the neuro-physiology
of dream. Although psychoanalysis has mainly studied the psychic contents of dreaming, the current contribution of the neurosciences enhances exchanges and generates rich contaminations. New theories and approaches have surfaced in both fields proposing challenging and innovative reflections on dreaming, indeed one of the most puzzling mental phenomena.
Keywords: Dream, dreaming, unconscious mind, neurosciences.