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Abstract
In an investigation of biological indicators of stress in normal humans, undergraduate
psychology students were differentiated on trait anxiety and assessed under baseline,
preexam (stress), and postexam conditions. Assessment at each condition involved drawing
20 ml of blood, followed by self-reporting for selected questionnaires. Self-reports
included state anxiety, general psychological symptomatology, dysfunctional attitudes,
academic confidence, sleep patterns, and intake of drugs, including alcohol and caffeine.
Blood was analyzed for whole blood serotonin content, plasma MHPG, and platelet imipramine
binding. Baseline differences between high and low trait anxious students on biological
measures were significant only for whole blood serotonin content. Variation across
situational conditions was significant for whole blood serotonin, with an increase
under the stressful condition for both anxiety groups. Thus, serotonin is highlighted
as an important factor in the human response to stress, whereas expected differences
in MHPG were not observed. The serotonergic response to stress was not explained by
changes in psychological or physical state variables. Changes in serotonin content
were positively correlated with changes in platelet impramine binding.
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Article info
Publication history
Received in revised form:
January 15,
1985
Received:
October 17,
1984
Identification
Copyright
© 1985 Published by Elsevier Inc.