This study investigates the sensory profiles and pain modulation mechanisms in people living with Parkinson's disease and chronic pain. The purpose is to understand the differences in pain sensitivity and management in these individuals. Participants will be involved in the study for a total duration of time that is not specified in the description, but it includes multiple sessions to assess pain thresholds and modulation responses.

Participants will undergo various procedures including thermal, tactile, and pressure stimulation to determine pain and non-pain sensations. Additionally, the study will explore cognitive modulation through visual cues and conditioned pain modulation using heat and cold stimuli. These procedures aim to reveal unique pain processing alterations in Parkinson's disease patients.

• Who can participate: Participants aged 50-80 years with Parkinson's disease, chronic pain, or healthy volunteers without major neurological conditions can join. Key eligibility includes having Parkinson's disease diagnosed after age 50 or being a healthy individual without major neurological conditions.
• Study details: Participants will experience different stimuli to assess pain thresholds and modulation. The study involves comparing those with Parkinson's disease and chronic pain to healthy individuals using cognitive and conditioned pain modulation methods.