New developments in the understanding and management of persistent pain

Area of Science:

• Neuroscience
• Pain Research
• Psychology

Background:

• Chronic pain is often attributed to peripheral factors, but central mechanisms may play a more significant role.
• Understanding the transition from acute to chronic pain is crucial for developing effective interventions.

Purpose of the Study:

• To review empirical findings on central factors in pain chronicity.
• To discuss the implications of these findings for pain treatment and prevention.

Main Methods:

• Literature review of neuroimaging studies on pain.
• Analysis of research on learning processes and their impact on pain perception.
• Examination of studies on body image processing, multisensory integration, and interoceptive feedback.

Main Results:

• Learning-induced functional and structural brain changes in sensorimotor, limbic, and frontal areas are implicated in chronic pain.
• These brain alterations resemble those seen in emotional disorders, highlighting the need to determine pain specificity.
• Disturbed body image processing, impaired multisensory integration, and faulty interoceptive feedback contribute to chronic pain.
• New treatments emerging from these findings include brain stimulation, mirror training, virtual reality, and behavioral extinction training.

Conclusions:

• Chronic pain involves learning-related and memory-related neuroplastic changes in the central nervous system.
• Maladaptive changes in body perception accompany these central nervous system alterations.
• Future treatments should target the modification of central pain memories and maladaptive body perceptions.