The Expression of the Emotions in Man and Animals a greater role for the higher cortical centres in the regulation of the emotional response, and touches on the theme of gender differences in emotional expression, anticipating the approach of sociologist Norbert Elias in "The Civilizing Process". In 1905, Sir Arthur Mitchell, a psychiatrist who had served as William A.F. Browne's deputy in the Scottish Lunacy Commission, published "About Dreaming, Laughing and Blushing", bridging some of Darwin's concerns with those of psychoanalysis. Freud's early publications on the symptoms of hysteria (with his influential concept of unconscious emotional conflict) acknowledged debts to Darwin's work on emotional expressionand Darwin's impact on psychoanalysis
Body language postural expressions of emotions such as anger/aggression, happiness, and fear. These similarities support the evolution argument that social animals (including humans) have a natural ability to relay emotional signals with one another, a notion shared by several academics (Chevalier-Skolnikoff, 1974; Linnankoski, Laakso, Aulanko, & Leinonen, 1994). Where Darwin notes similarity in expression among animals and humans, the Cultural Equivalence Model notes similarity in expression across cultures in humans, even though they may be completely different. One of the strongest pieces of evidence that supports this model was a study conducted by Ekman and Friesen (1971), where members of a preliterate