Smiling and Crying. - Abstract
Smiling and crying has always caught the interest of the scientists. These basic human
expressions are known to provide an insight into the mind of humans. Thus a need to regulate these behaviors is seen across all cultures. Both smiling and crying can be either emotional congruent or incongruent depending on the learned behavior or it can entirely be a brainstem mediated response having no connection to emotions or social behavior. Since smile and crying generally depict an emotional state of euphoria and sadness, respectively, these behaviors are seen across many psychiatric disorders. Malfunctioning of brain parts and gender differences involved in smiling and crying are discussed in this review article.