What does herniation mean?
Herniation is the medical term for the protrusion of tissue through a weakness or opening in the tissue that normally contains or supports it. It is especially familiar in the phrase disc herniation, in which the cushion-like disc between vertebrae bulges or tears through its outer covering and may press on nearby nerves. In emergency medicine, brain herniation refers to dangerous displacement of brain tissue caused by severe pressure or injury. The word is more precise than the casual expression ‘slipped disc’ and is useful in distinguishing the underlying anatomical process from a general complaint of back pain. Although people may speak loosely of a ‘herniation,’ the term is primarily clinical and generally implies an identifiable structural displacement that can be described through examination or medical imaging.
nounThe process or condition in which an organ or tissue protrudes through a weakness or opening in the surrounding tissue, often because of increased pressure. The term is especially used for a herniated spinal disc and for brain herniation.
- The protrusion of an organ or tissue through a weakness, opening, or defect in the surrounding tissue, or the medical condition resulting from this process.
"The scan showed a disc herniation compressing the spinal nerve."
"The patient was diagnosed with a lumbar disc herniation after experiencing shooting pain down one leg."
"Rapidly increasing pressure can cause brain herniation in a severe head injury."
The plural is grammatically standard but uncommon in ordinary writing; it is more likely in clinical or technical discussion of multiple cases.
"The report described several small disc herniations without nerve involvement."
A ‘slipped disc’ is more precisely a herniated disc: the cushion between vertebrae bulges or pushes out through a tear in its tough outer ring.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does herniation come from?
English herniation comes through Latin medical usage from the Latin word hernia, meaning ‘rupture’ or ‘protrusion.’ The Latin term is related to Greek hernia, also meaning ‘rupture,’ and refers to an organ or tissue protruding through a defect in the surrounding structure. Modern medical derivatives include hernial, herniate, herniotomy, and hernioplasty, all of which reflect the same Latin and Greek root.
How herniation is actually used
This is a formal medical term, used in clinical discussion, radiology, and reports. It is broader than the everyday phrase ‘slipped disc’ and should not be used as a synonym for every instance of a hernia.
Easily confused with herniation
A hernia is the protrusion or opening itself, whereas herniation is the process or condition of tissue protruding through a weakness or opening.