An Unusual Presentation of Respiratory Dysfunction in Parkinson's Disease: A Case Study.

Parkinson's disease (PD) is a progressive neurodegenerative disorder affecting around 10 million people worldwide. It is primarily associated with the loss of dopaminergic neurons in the substantia nigra pars compacta, though the exact mechanism is unclear. PD is characterized by resting tremor, muscular rigidity, bradykinesia, and postural instability.