The Edinburgh Inventory was used to assess handedness in a normal population. The incidence of strong right-handedness increased with age and the incidence of left-handedness fell with age, both significantly. A non-significant increase in the incidence of left-handedness in twins was observed. The difference in the incidence of left-handedness for males and females failed to reach significance but more males were left-handed than females. Any difference in the incidence of left-handedness between the sexes must be small (less than 1.5%) and this has major theoretical implications.
Objective: To test the hypothesis that anosognosia-for-dyskinesias in Parkinson's disease (PD) results from a failure to detect discrepancies between intended and actual movement.Background: PD patients often complain of drug-induced dyskinesias (involuntary
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