One piece of evidence that social and cultural factors play a role in conversion disorder is shown from the decreasing of this disorder in the last few centuries. Several hypotheses that explain that this disorder begin to decrease is such therapists who are experts in the field of psychoanalysis to mention that in the second half of the 19th century, when the rate of occurrence of conversion disorder is high in France and Austria, seyual behavior in repress may contribute to the increased prevalence of this disorder. The reduced interference may be caused by the increasing versatility of seyual norms and the development of the science of psychology and medicine in the 20th century, which is more tolerant of anxiety due to dysfunction not related to physiological terms than before. In addition, the role of social and cultural factors also indicate that conversion disorder is more often experienced by those who live in rural areas or at the level of low socioeconomic (Binzer et al., 1996; Folks, Ford & Regan, 1984 in Davidson, Neale, Kring, 2004 ). They experience this due to lack of knowledge about the medical and psychological concepts. Meanwhile, the diagnosis of hysteria reduced in industrialized societies, such as the UK, and is more common in underdeveloped countries, such as Libya (Pu et al., In Davidson, Neale, Kring, 2004).
Although genetic factors expected to be an important factor in the development of conversion disorder, research does not support this. Meanwhile, in several studies, conversion symptoms more often appears on the left side of the body than the right side (Binzer et al., In Davidson, Neale, Kring, 2004). This is an exciting discovery because the function of the left side of the body is controlled by the right hemisphere of the brain. The right hemisphere of the brain is also expected to play a bigger role than the left hemisphere is associated with negative emotions. However, based on a larger research note that there is no observable difference of the frequency of symptoms on the right versus the left side of the brain (Roelofs et al., In Davidson, Neale, Kring, 2004).
Although genetic factors expected to be an important factor in the development of conversion disorder, research does not support this. Meanwhile, in several studies, conversion symptoms more often appears on the left side of the body than the right side (Binzer et al., In Davidson, Neale, Kring, 2004). This is an exciting discovery because the function of the left side of the body is controlled by the right hemisphere of the brain. The right hemisphere of the brain is also expected to play a bigger role than the left hemisphere is associated with negative emotions. However, based on a larger research note that there is no observable difference of the frequency of symptoms on the right versus the left side of the brain (Roelofs et al., In Davidson, Neale, Kring, 2004).
