Stress as a modulator of motor system function and pathology

Area of Science:

• Neuroscience
• Behavioral Science
• Endocrinology

Background:

• Stress classically impacts limbic functions (learning, memory, emotion).
• Emerging evidence shows stress also modulates motor system function and movement disorders.
• Motor system circuits possess glucocorticoid receptors, making them sensitive to stress hormones.

Purpose of the Study:

• To explore the influence of stress on motor system function and movement disorders.
• To investigate the mechanisms by which stress affects motor performance and neurodegenerative diseases.
• To highlight the role of stress in conditions like Parkinson's disease.

Main Methods:

• Review of recent evidence on stress, glucocorticoids, and motor function.
• Analysis of the role of the hypothalamic-pituitary-adrenal axis and dopaminergic system.
• Examination of glucocorticoids' effects on neuronal plasticity.

Main Results:

• Stress modulates both temporal and spatial aspects of motor performance, particularly skilled movements.
• Stress affects motor function via the hypothalamic-pituitary-adrenal axis, emotional changes, and the dopaminergic system.
• Stress and glucocorticoids influence the pathology of dopamine-related movement disorders, such as Parkinson's disease, and neuronal plasticity.

Conclusions:

• Stress is a significant modulator of motor system function in both healthy and damaged brains.
• Understanding stress's role is crucial for developing future therapies for neurodegenerative movement disorders.
• Glucocorticoids' modulation of neuronal plasticity impacts compensation in neurodegenerative diseases like Parkinson's.