Taste function in patients with Parkinson disease.

Despite the important role of taste function in nutrition and health, little is known about changes in taste function caused by Parkinson disease (PD). The taste function of 31 PD patients and 29 healthy controls was assessed quantitatively using filter paper taste strip tests (TSTs) impregnated with four basic taste qualities at four different concentrations. The mean TST score was significantly lower in PD patients, as a consequence of taste impairment in the female PD patients (it did not differ significantly in males), which was likely to be attributable to the lower Mini-Mental State Examination score in patients with PD than in controls in women. TST scores in PD patients were not correlated with patient age, duration, or severity of their PD, or olfactory function. The findings of our study suggest that taste dysfunction should be included in the list of nonmotor symptoms of PD.