The power of placebos has long been recognized for improving numerous medical
conditions such as Parkinson's disease (PD). Little is known, however, about the mechanism …

Clinical symptoms of Parkinson's disease (PD) do not manifest until dopamine (DA)
neuronal loss reaches a symptomatic threshold. To explore the mechanisms of functional …

13 NO 3 − was used to investigate patterns of NO 3 − influx into roots of barley plants (Hordeum
vulgare L. cv Klondike) previously grown with (`induced') or without (`uninduced') a …

Peak-dose dyskinesias are abnormal movements that usually occur 1 h after oral
administration of levodopa, and often complicate chronic treatment of Parkinson's disease. We …

Short-term influxes of 13NH4+ were measured in intact roots of 3-week-old rice (Oryza
sativa L. cv M202) seedlings that were hydroponically grown at 2, 100, or 1000 [mu]M NH4+. …

Using the ability of [ 11 C]raclopride to compete with dopamine for D 2 /D 3 receptors, we
investigated by positron emission tomography the effect of placebo (saline) injection on …

Context Expectations play a central role in the mechanism of the placebo effect. In Parkinson
disease (PD), the placebo effect is associated with release of endogenous dopamine in …

Radioligand binding studies in animals have demonstrated age‐related loss of dopamine
receptors in the caudate and putamen. In humans, while age‐related declines in dopamine …

Motor fluctuations are a major disabling complication in the treatment of Parkinson's disease.
To investigate whether such oscillations in mobility can be attributed to changes in the …

Parkinson's disease may arise from multiple aetiologies, including genetic mutations that
are for the most part uncommon. We describe here the positron emission tomography (PET) …