The diversity between cultures differs greatly when it comes to social norms, but among all these different cultures there is one similarity: psychopaths. A psychopath is defined as a person with a mental illness who exhibits abnormal or violent behavior, has deficient emotional processing, and an absence of morals related to appropriate decision making. Despite growing research in the fields of psychopathology and neurobiology, the neural substrates underlying these bizarre and ferocious behaviors are still uncertain. However, numerous previous studies have linked psychopathic behavior to cortical and subcortical emotional areas, primarily the amygdala. The following three studies explore the relationships between the affective areas of the brain and the eccentric behavior of a psychopath using 3 different stimuli: images, words and faces. To begin with, the purpose of the first experiment was to discover which areas of the brain are associated with abnormal emotional processing and the resulting disturbed social interactions that follow. The total number of participants after excluding 2 due to artifacts was 12 right-handed males. The control group consisted of 6 healthy males who had no history of neuropsychiatric problems, a mean age of 28.8 and a standard deviation of 4.14. The experimental group consisted of 6 psychopathic individuals convicted of crimes and taken from a high-security psychiatric ward with a mean age of 33 years and a standard deviation of 8. The researchers measured psychopathy using the Hare Psychopathy Checklist-Revised ( PCL-R [which measured psychopathy on a scale of 0 to 40]). They used the Positive and Negative Affect Schedule (PANAS) to assess global affective states before conducting the experiment... half of the article ......ide the limbic system, which indicates that psychopaths use cognitive systems and not limbic. strategies for processing affective stimuli. The third study found a significant reduction in activation of fearful faces in areas responsible for processing facial emotions in psychopaths. Furthermore, psychopathic individuals showed reduced visual cortical activation when they were exposed to both fearful and happy faces, suggesting that the neural basis for processing happy facial expressions is intact in psychopathic individuals, but they are less reactive normal individuals. . Abnormal facial emotion recognition processing leads to violent, inappropriate, and less empathetic behavior. Although the etiology of this disorder is still unknown, these experiments have laid the foundation for future research to discover more about the abnormalities found in the psychopathic brain..