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  • Title: Subclinical cerebellar dysfunction in patients with migraine: evidence from eyeblink conditioning.
    Author: Gerwig M, Rauschen L, Gaul C, Katsarava Z, Timmann D.
    Journal: Cephalalgia; 2014 Oct; 34(11):904-13. PubMed ID: 24567118.
    Abstract:
    BACKGROUND: Clinical findings suggest cerebellar dysfunction in patients with migraine. Eyeblink classical conditioning (EBCC) is a simple form of associative learning which depends on the integrity of the cerebellum. The aim of this study was to assess whether EBCC is disturbed in patients with migraine. METHODS: A delay conditioning paradigm was used in the headache-free interval in 32 female patients with migraine, in 24 of them without (MwoA) and eight with aura (MwA), and in 32 age-matched female controls. As primary outcome measure acquisition and as secondary outcome measures timing and extinction of conditioned eyeblink responses (CR) were assessed. RESULTS: CR acquisition was significantly reduced in all migraine patients (mean total CR incidence 35.2 ± 22.1%) compared to controls (54.7 ± 21.3%; p < 0.001; Bonferroni-corrected p level < 0.025) and in MwA patients (19.9 ± 20.2%) compared to matched controls (58.2 ± 27.0%; p = 0.006) but not in MwoA patients (40.3 ± 20.6%) compared to matched controls (53.6 ± 19.7%; p = 0.028; Bonferroni-corrected p level < 0.0166). Decrease of CR incidences in MwA patients was not significantly different compared to MwoA patients (p = 0.021; Bonferroni-corrected p level < 0.0166). CR timing and extinction was not affected in migraine patients. CONCLUSIONS: Reduced acquisition of CRs in the cohort of female patients studied here supports findings of a cerebellar dysfunction in migraine.
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