Complex sentence: The philosopher Spinoza's concept of conation, Mesmer's development of hypnosis together with Charcot's refinement of this technique influenced Sigmund Freud who's development of psychoanalytic theory was to have a profound impact on the development of Liaison Psychiatry.
Split into simpler sentences: The philosopher Spinoza's concept of conation, Mesmer's development of hypnosis together with Charcot's refinement of this technique influenced Sigmund Freud. Freud's development of psychoanalytic theory was to have a profound impact on the development of Liaison Psychiatry.