In general, two categories of pain perception have been described: a sharp first pain and a more delayed (and longer-lasting) sensation that is called other pain.

Many intercurrent factors may be included in the modulation of the pain message and its expression, such as the last experience of pain built along life. In Pain Perception study, assessments directed to ascertain whether susceptibility to experimentally produced pain. Pain is differentially affected by the individual earlier painful occurrence in objects with major depression (MD), schizophrenia (SC), and control (C).

The MD (32), SC (30) and C (30) assemblages concurred in experimental pain tests (applicability of pressure and initiation of ischemia) after a semi-structured interview to create an inventory of the last painful experiences. And anxiety evaluated as either with autonomic (heart rate, blood pressure) or psychological (Hospital Anxiety Depression scale HAD) measures and catastrophism.

The expressed pain intensities, severities, duration, of the previous pain events, and the number of last painful effects were equivalent in the three groups, except for the number of painful events tested before the previous six months which was lower in the MD group. Test pain sensitivity was affected by the diagnosis; the HAD scores, or the number and intensities of past lived painful events.

The lack of experience of pain was relative to the various groups, recommending that psychiatric disorders do not affect the experience of pain related to daily life or past event.