where does sadness come from in the brain
Sadness According to the American Journal of Psychiatry, sadness has been found to be associated with "increases in bilateral activity within the vicinity of the middle and posterior temporal cortex, lateral cerebellum, cerebellar vermis, midbrain, putamen, and caudate."[9] Jose V. Pardo has his M.D and Ph.D and leads a research program in cognitive neuroscience. Using positron emission tomography (PET) Pardo and his colleagues were able to provoke sadness among seven normal men and women by asking them to think about sad things. They observed increased brain activity in the bilateral inferior and orbitofrontal cortex.[10] In a study that induced sadness in subjects by showing emotional film clips, the feeling was correlated with significant increases in regional brain activity, especially in the prefrontal cortex, in the region called Brodmann's area 9, and the thalamus. A significant increase in activity was also observed in the bilateral anterior temporal structures.[11]
Facial expression The universality hypothesis is the assumption that certain facial expressions and face-related acts/ events are signals of specific emotions (happiness with laughter and smiling, sadness with tears, anger with a clenched jaw, fear with a grimace, surprise with raised eyebrows and wide eyes along with a slight retraction of the ears, and disgust with a wrinkled nose and squinted eyes— emotions which frequently lack the social component of those like shame, pride, jealousy, envy, deferance, etc.) and are recognized by people regardless of culture, language, or time. The belief in the evolutionary basis of these kinds of facial expressions can be traced back to Darwin’s The Expression of the Emotions in Man and Animals. Reviews of the universality hypothesis have been both supportive[18][19] and critical.[20][21] Work in 2013 by Nelson and Russell[22] and Jack et al.[23] has been especially critical.