There have been a number of theories about this, such as the relative involvement of cerebral hemispheres in emotional processing, or more simply, that it was "easier" to live with a functional deficit on the non-dominant side. However, a literature review of 121 studies established that this was not true, with publication bias the most likely explanation for this commonly held view. Although agitation is often assumed to be a positive sign of conversion disorder, release of epinephrine is a well-demonstrated cause of paralysis from hypokalemic periodic paralysis.Misdiagnosis does sometimes occur. In a highly influential study from the 1960s, Eliot Slater demonstrated that misdiagnoses had occurred in one third of his 112 patients with conversion disorder. Later authors have argued that the paper was flawed, however, and a meta-analysis has shown that misdiagnosis rates since that paper was published are around four percent, the same as for other neurological diseases. Deliberate feigning
Conversion disorder, by its nature, is more prone to deliberate feigning. One neuroimaging study suggested that feigning may be distinguished from conversion by the pattern of frontal lobe activation. Psychological mechanism
The psychological mechanism of conversion can be the most difficult aspect of a conversion diagnosis. Even if there is a clear antecedent trauma or other possible psychological trigger, it is still not clear exactly how this gives rise to the symptoms observed.
Sowda is a cutaneous condition, a localized type of onchocerciasis. : 440 
This is mostly seen in patients with the disease from Yemen, Saudi Arabia, East and West Africa

See also
Skin lesion


== References ==