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  • Title: Effects of acute cholecystokinin infusion on hemispheric EEG asymmetry and coherence in healthy volunteers.
    Author: Knott V, Mahoney C, Bradwejn J, Shlik J, Gunnarsson T.
    Journal: Prog Neuropsychopharmacol Biol Psychiatry; 2003 Feb; 27(1):179-84. PubMed ID: 12551742.
    Abstract:
    This study investigated the effects of continuous slow infusion of cholecystokinin tetrapeptide (CCK-4), a neuropeptide with panicogenic properties, on functional hemispheric differences, as indexed by quantitative electroencephalographic (EEG) asymmetry and coherence measures. Twenty-four adult volunteers (15 females and 9 males) were assigned to infusion with either placebo or CCK-4 in a randomized, double-blind, parallel-group design, with EEG being recorded before and during (10 and 40 min) a 60-min infusion period. No significant treatment differences were observed for absolute EEG power but, compared to placebo, CCK-4 infusion increased asymmetry and reduced coherence of slow-wave activity at midtemporal recording sites. These findings support the contention that functional imbalance of the temporal cortex, perhaps mediated by CCK-4, is involved in panic disorder (PD).
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