A researcher at the University of California, San Diego (UCSD) School of Medicine suggests that psychiatrists may need to approach the treatment of psychiatric patients from a new direction by understanding that such individuals behavior and decision-making are based on an attempt to reach an inner equilibrium.
In a special section in the October 26 issue of the journal Science, Martin Paulus, M.D., professor in UCSDs Department of Psychiatry, has compiled a body of growing evidence that human decision-making is inextricably linked to an individuals need to maintain a homeostatic balance.
This is a state of dynamic equilibrium, much like controlling body temperature, said Paulus. How humans select a particular course of action may be in response to raising or lowering that set point back to their individual comfort zone. In people with psychiatric disorders or addictions, the thermostat may be broken.
Up to now, according to Paulus, psychiatrists and others have looked at the decision-making process as a considered series of options and values.
What has never been considered closely, but should be, is the state of the decision-maker, Paulus said. According to the researcher, this homeostatic state the tendency to maintain internal stability, due to the mind and bodys coordinated responses to any stimulus that disturbs the normal condition is altered in individuals with addictions and psychiatric disorders such as schizophrenia or anxiety. This disturbance of homeostatic balance leads to dysfunctions in decision-making which helps explain why such patients make seemingly bad choices, he said.
Recent neuroimaging research shows strong support for the homeostatic nature of decision making, according to Paulus. For example, interoceptive information which is related to the bodys internal state or sense of balance is integrated in a particular part of the brain called the anterior insular cortex, he said.
|Contact: Debra Kain|
University of California - San Diego