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ObjectiveTo examine whether near‐infrared light (NIr) treatment reduces clinical signs and/or offers neuroprotection in a subacute 1‐methyl‐4‐phenyl‐1,2,3,6‐tetrahydropyridine (MPTP) monkey model of Parkinson disease.
MethodsWe implanted an optical fiber device that delivered NIr (670nm) to the midbrain of macaque monkeys, close to the substantia nigra of both sides. MPTP injections (1.5–2.1mg/kg)...
The pedunculopontine nucleus is part of the reticular ascending arousal system and is involved in locomotion and sleep. Two patients with Parkinson disease received electrodes that stimulated the pedunculopontine nucleus area to alleviate their severe gait impairment. Instead, we found that low‐frequency stimulation of the pedunculopontine nucleus area increased alertness, whereas high‐frequency stimulation...
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