This study investigates how transcranial direct current stimulation (tDCS), a non-invasive brain stimulation technique, affects pain perception. The focus is on the motor cortex and cerebellum, which are parts of the brain involved in movement and coordination. The study aims to understand how these areas influence the experience of pain from stimuli like cold and pressure.

Participants will undergo procedures involving anodal tDCS, which is a type of stimulation that increases brain activity, to assess its impact on pain inhibitory capacity. This is measured during a process called conditioned pain modulation (CPM), where the body's natural ability to diminish pain is evaluated.

• Who can participate: Healthy older adults who do not have diabetes, cardiovascular, or neurological conditions or diseases can participate. Individuals using neurological drugs, chronic opioids, narcotics, tobacco, or with uncontrolled hypertension are excluded.
• Study details: Participants will receive transcranial direct current stimulation, which is a non-invasive procedure where a mild electrical current is applied to the scalp. The study will compare the effects of stimulation on different brain areas related to pain perception.