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  • Title: Inverted-U function between salivary cortisol and retrieval of verbal memory after hydrocortisone treatment.
    Author: Domes G, Rothfischer J, Reichwald U, Hautzinger M.
    Journal: Behav Neurosci; 2005 Apr; 119(2):512-7. PubMed ID: 15839797.
    Abstract:
    The present study investigated the effect of a single oral dose of hydrocortisone (cortisol) on retrieval of verbal and nonverbal declarative memory. Fifty-nine healthy participants were randomly assigned to either receive 25 mg cortisol or a placebo 45 min before retrieval in a standardized memory test procedure. There was no global effect of cortisol on either verbal or nonverbal memory. However, a specific negative effect on free recall of associative verbal material appeared. In addition, high responders (salivary cortisol concentration>68.25 nmol/L) exhibited impaired verbal memory compared with low responders (<68.25 nmol/L). The results suggest specific nonlinear effects of cortisol on declarative memory retrieval, which appear to be more pronounced for verbal material.
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