Pain pathways
Read the topic background here, then explore the labeled visual and structured learning explanations on this page.
Read explanation on this page ↓ See diagram ↓Nociception — on-site reading
This reference extract addresses Nociception, a related subject. It does not cover every part of Pain pathways.. The article introduction is reproduced here, so you do not need to leave MedAtlas to read it. It may not match the latest official medical guidance.
In physiology, nociception /ˌnəʊsɪˈsɛpʃ(ə)n/, also nocioception (from Latin nocere 'to harm/hurt'), is the sensory nervous system's process of encoding noxious stimuli. It deals with a series of events and processes required for an organism to receive a painful stimulus, convert it to a molecular signal, and recognize and characterize the signal to trigger an appropriate defensive response.
In nociception, intense chemical (e.g., capsaicin present in chili pepper or cayenne pepper), mechanical (e.g., cutting, crushing), or thermal (heat and cold) stimulation of sensory neurons called nociceptors produces a signal that travels along a chain of nerve fibers to the brain. Nociception triggers a variety of physiological and behavioral responses to protect the organism against an aggression, and usually results in a subjective experience, or perception, of pain in sentient beings.
How this connects to Anaesthesiology and Critical Care
Perioperative and interventional study starts with the relevant anatomy, physiological reserve, intended benefit and potential harms. Preprocedure planning includes appropriate assessment, consent and monitoring; techniques themselves require accredited practical training and patient-specific oversight.
Text credit: Wikipedia contributors, “Nociception”, original article · authors & revision history · CC BY-SA 4.0. Unmodified opening extract, accessed 24 September 2026. This Wikipedia-derived section is provided under CC BY-SA 4.0; the independent MedAtlas notes and design are separate works.
Pain pathways · visual study map
Scalable vector illustration. Labeled conceptual map, not a precise anatomical, histological or diagnostic image.The wording in this learning map is adapted from the attributed Wikipedia background section below (CC BY-SA 4.0).
What the underlying subject studies
Anaesthesiology and critical care connect airway anatomy, ventilation, perfusion, consciousness, pain and organ support. Small changes in physiology may have important effects during illness and procedures.
How mechanisms and evidence connect
Clinical monitoring provides partial measurements, each with limitations. Mechanical, pharmacological and hemodynamic effects interact and must be interpreted in the whole-patient context.
How to develop a sound explanation
For study, trace the normal physiologic variable, possible disturbance, available monitoring and broad safety principles. This website does not supply procedural steps or device settings for clinical use.
References and verification (optional)
All reading material on this page appears above. The links below are for checking the primary syllabus, research or source attribution, not requirements for opening this lesson.
NMC official CBME Curriculum 2024 and current regulations index ↗