INTRODUCTION: In addition to the classic triad (tremor, rigidity and akinesia), 
Parkinson's disease (PD) is also accompanied by several non-motor disorders.
AIM: To carry out an updated review of these non-motor symptoms in terms of 
their pathophysiology, epidemiology, clinical features and treatment.
DEVELOPMENT: Autonomic disorders such as seborrhoeic dermatitis and disorders 
involving sweating, fatigue, weight loss or respiratory problems (dyspnea, 
inspiratory stridor) are highly prevalent and very disabling symptoms. In 
addition, they may be the main problem in a particular phase of PD (fatigue, 
stridor) and condition the quality of life of patients with Parkinson. They are 
often neglected and remain undetected. Although they may respond to dopaminergic 
agents, they usually require a different therapeutic approach. Studies are 
needed to evaluate new therapeutic perspectives that act against the 
pathophysiological mechanisms of these disorders.
CONCLUSIONS: PD affects systems other than the dopaminergic nigrostriatal. A 
better understanding of this pathology will make it possible to approach and 
optimise the treatment of the conditioning symptoms, thereby enhancing the 
welfare of patients with PD.