Search activity concept (SAC) is a psychophysiological concept that integrates subject’s behavior, resistance to stress and deteriorating factors, pathogenetic mechanisms of different mental and psychosomatic disorders, REM sleep functions, brain monoamines activity and brain laterality.
Contents
History
The term SAC was coined during the 1970s by V.S. Rotenberg together with V.V. Arshavsky on the basis of the physiological investigations on humans and animals according to the role of different forms of behaviour in body resistance to stress and diseases.
Behavioural attitudes
SAC distinguishes the following types of behaviour:
Behaviour and body resistance
All forms of behaviour that contain SA belong to coping and increase the body’s resistance to stress and deteriorating factors. Absence of SA leads in stressful conditions to the development of mental (depression, anxiety) and psychosomatic disorders. In opposite to the concept of coping, the value of SA lies in the process itself, not in the pragmatic outcomes of behaviour.
Behaviour and paradoxical (REM) sleep
According to SAC, covert SA in REM sleep during dreams compensates for the lack of SA in the preceding wakefulness and ensures the resumption of SA in the wakefulness that follows. Functionally sufficient REM sleep dreams (based in humans on high right hemispheric skills) is crucial for preventing mental and psychosomatic disorders. In animals REM sleep deprivation combined with Pa causes death.
Behaviour, REM sleep and brain monoamines
It is a positive feedback between SA and brain monoamines in wakefulness. In REM sleep SA is based on the nonmodulated brain dopamine activity and provides the condition for the resensitization of the norepinephrine postsynaptic receptors.
Behaviour and some mental disorders
Paranoid schizophrenia is explained as a misdirected and irrelevant SA as an outcome of the functional deficiency of the polysemantic right-hemispheric way of thinking. Anorexia nervosa displays a misdirected pathological SA (confrontation with challenges like appetite, pressure of relatives etc.) as a compensation of deficient SA in other domains.