Figure 2
From: Metal concentrations and distributions in the human olfactory bulb in Parkinson’s disease

Differences in metal concentrations in the human olfactory bulb and tract in normal (n = 7) and Parkinson’s disease (PD; n = 7)) patients. (a) Sodium is present at higher levels in the olfactory bulb and tract in PD, while (b) iron is higher in the olfactory bulb in this disease. Values are mean ± SEM. *p < 0.05; **p < 0.01.