Non-right-handedness is associated with migraine and soft bipolarity in patients with mood disorders

Cross‐prevalence of migraine and bipolar disorder

“…Moreover, an association between migraine and bipolar affective temperaments was recently reported by Fasmer et al. (10).…”

More severe impairment of manual dexterity in bipolar disorder compared to unipolar major depression

“…Fourthly, the self-reported handedness was not verified using a validated hand preference questionnaire. A previous study has shown that non-right handedness is associated with soft bipolarity in mood disorders (Fasmer et al, 2008). Therefore, different rates of mixed-handed persons in each diagnostic group may have confounded the results of the pegboard test.…”

Frequency of non-right-handedness in bipolar disorder and schizophrenia

“…One study in BPD reported increased self-identified NRH relative to controls (van Dyck et al, 2012). Others reported no significant increases relative to controls based on small samples (Nasrallah and McCalley-Whitters, 1982; Savitz et al, 2007; Yan et al, 1985) or increased NRH in the absence of controls (Fasmer et al, 2008; Nowakowska et al, 2008), using either self-rating or performance-based measures. This paper reports results from two complementary studies.…”