Pain Mechanisms and Quality of Life in Parkinson's Disease

Chronic pain affects a majority of people with Parkinson’s disease, often emerging early and persisting throughout the course of illness. This pain arises from a complex interplay of peripheral and central processes, including degeneration of dopaminergic neurons in the substantia nigra and downstream alterations in spinal cord and brainstem nuclei. Misfolded α-synuclein infiltrates sensory pathways, disrupting normal nociceptive modulation and contributing to neuropathic pain syndromes. Altered neurotransmitter dynamics—particularly loss of dopamine and noradrenaline—dysregulate descending pain inhibition, while neuroinflammatory activation of microglia and astrocytes perpetuates sensitisation within dorsal horn circuits. Beyond sensory disturbance, dysfunction in limbic and paralimbic centres (amygdala, nucleus accumbens and habenula) amplifies the emotional and cognitive dimensions of pain. The cumulative burden of constant or fluctuating pain profoundly diminishes health-related quality of life, exacerbating mood disorders, sleep disruption and motor disability. Current management strategies remain suboptimal, underscoring the need for targeted analgesic approaches that address the specific pathophysiological drivers of Parkinson-related pain and its impact on daily functioning.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Pain Mechanisms and Quality of Life in Parkinson's Disease publication trend

The graph below shows the total number of articles in pain mechanisms and quality of life in parkinson's disease across all publications each year (not limited to Nature Index journals).

Technical terms

Allodynia: Pain elicited by stimuli that do not normally provoke pain, indicative of central sensitisation.

Nociception: The neural processes of encoding and processing noxious stimuli by specialised sensory neurons.

Periaqueductal grey (PAG): A midbrain structure crucial for descending modulation of pain and integration of analgesic pathways.

Pedunculopontine tegmental nucleus (PPTg): A brainstem region involved in sensorimotor integration and a target for deep brain stimulation in Parkinson’s disease.

α-Synuclein: A neuronal protein that misfolds and aggregates in Parkinson’s disease, propagating pathology through interconnected neural circuits.

Quality of life (QoL): A multidimensional concept reflecting physical, emotional and social well-being as perceived by the individual.

References

1. Periaqueductal grey and spinal cord pathology contribute to pain in Parkinson’s disease. npj Parkinson's Disease (2023).
2. Activation of Pedunculopontine Tegmental Nucleus Alleviates the Pain Induced by the Lesion of Midbrain Dopaminergic Neurons. International Journal of Molecular Sciences (2024).
3. Pain in Parkinson's disease: a neuroanatomy-based approach. Brain Communications (2024).
4. Trans-synaptic spreading of alpha-synuclein pathology through sensory afferents leads to sensory nerve degeneration and neuropathic pain. Acta Neuropathologica Communications (2021).